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diff --git a/Master/texmf-dist/tex/latex-dev/latex-lab/latex-lab-mathtagging.ltx b/Master/texmf-dist/tex/latex-dev/latex-lab/latex-lab-mathtagging.ltx
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+%%
+%% This is file `latex-lab-mathtagging.ltx',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% latex-lab-mathtagging.dtx (with options: `kernel')
+%%
+%% This is a generated file.
+%%
+%% Copyright 2021-2023 LaTeX Project
+%%
+%% This file was generated from file(s) of the `LaTeX-lab Bundle'.
+%% ------------------------------------------------------------------------------------
+%%
+%% It may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3c
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%% http://www.latex-project.org/lppl.txt
+%% and version 1.3c or later is part of all distributions of LaTeX
+%% version 2008 or later.
+%%
+%% This file may only be distributed together with a copy of the LaTeX
+%% `LaTeX-lab Bundle'. You may however distribute the `LaTeX-lab Bundle'
+%% without such generated files.
+%%
+%% The newest sources can be found below
+%%
+%% https://github.com/latex3/latex2e/required/latex-lab
+%%
+%% where one can also log issues in case there are any.
+%%
+%%
+%% File: latex-lab-mathtagging.dtx
+\def\ltmathtaggingdate{2023-03-08}
+\def\ltmathtaggingversion{v0.5a}
+\ProvidesFile{latex-lab-mathtagging.ltx}
+ [\ltmathtaggingdate\space
+ \ltmathtaggingversion\space
+ Grab all the math(s) and tag it (experiments)]
+\AddToHook{begindocument/before}{\RequirePackage{latex-lab-testphase-block-tagging}}
+\ExplSyntaxOn
+\tl_gput_right:Nn \@kernel@before@begindocument
+ { \RequirePackage { amsmath } }
+\bool_new:N \l__math_collected_bool
+\tl_new:N \g__math_grabbed_env_tl
+\tl_new:N \g__math_grabbed_math_tl
+\cs_new_protected:Npn \__math_process:nn #1#2
+ {
+ \legacy_if:nF { measuring@ }
+ {
+ \tl_if_in:nnF {#2} { \m@th }
+ { \tl_trim_spaces_apply:nN {#2} \__math_process_auxi:nn {#1} }
+ }
+ }
+\cs_generate_variant:Nn \__math_process:nn { V }
+\cs_new_protected:Npn \__math_process_auxi:nn #1#2
+ {
+ \tl_gset:Nn \g__math_grabbed_env_tl {#2}
+ \tl_gset:Nn \g__math_grabbed_math_tl {#1}
+ \__math_process_auxii:nn {#2} {#1}
+ }
+\cs_new_protected:Npn \__math_process_auxii:nn #1#2 { }
+\cs_new_protected:Npn \math_processor:n #1
+ { \cs_set_protected:Npn \__math_process_auxii:nn ##1##2 {#1} }
+\cs_new_protected:Npn \__math_grab_dollar:w % $
+ #1 $
+ {
+ \tl_if_blank:nF {#1}
+ {
+ \__math_process:nn { math } {#1} % $
+ \tagmcend %end P-chunk, in code: \tag_mc_end_push:
+ \@kernel@math@begin
+ #1 $
+ \@kernel@math@end
+ \tagmcbegin{} % restart P-chunk (whatsits in pdftex)
+ }
+ }
+
+\skip_new:N \l__math_tmpa_skip
+
+\cs_new_protected:Npn \__math_grab_dollardollar:w % $$
+ #1 $$
+ {
+ \tl_if_blank:nF {#1}
+ {
+ \__math_tag_dollardollar_display:nn { equation* }{#1}
+ #1
+ $$
+ }
+ }
+
+\cs_new_protected:Npn \@kernel@close@P {
+ \tagmcend %end P-chunk, in code: \tag_mc_end_push:
+ \int_gincr:N \g__tag_para_end_int
+ \bool_if:NT \l__tag_para_show_bool
+ { \tag_mc_begin:n{artifact}
+ \rlap{\color_select:n{red}\tiny\ \int_use:N\g__tag_para_end_int}
+ \tag_mc_end:
+ }
+ \tag_struct_end:
+}
+
+\cs_new_protected:Npn \__math_tag_dollardollar_display:nn #1#2 {
+ \__math_process:nn {#1} {#2}
+ \@kernel@close@P
+ \@kernel@math@begin
+%%
+}
+
+\cs_new_protected:Npn \__math_tag_dollardollar_display_end: {
+ \tagpdfparaOff
+ \para_raw_end:
+ \tagpdfparaOn
+ \l__math_tmpa_skip \lastskip
+ \@kernel@math@end
+ \penalty \postdisplaypenalty
+ \skip_vertical:n { -\l__math_tmpa_skip }
+ \@doendpe % this has no \end{...} to take care of it
+}
+
+\cs_new_protected:Npn \__math_grab_inline:w % \(
+ #1 \)
+ {
+ \tl_if_blank:nF {#1}
+ {
+ \__math_process:nn { math } {#1}
+ $ #1 $
+ }
+ \bool_set_false:N \l__math_collected_bool
+ }
+\cs_new_protected:Npn \__math_grab_eqn:w % \[
+ #1 \]
+ {
+ \begin { equation* } #1 \end { equation* }
+ }
+\tl_new:N \l__math_env_name_tl
+\keys_define:nn { __math }
+ {
+ arg-spec .code:n =
+ {
+ \ExpandArgs { c } \DeclareDocumentCommand
+ { __math_env \l__math_env_name_tl _aux: }
+ {#1}
+ { \__math_env_forward:w }
+ }
+ }
+\cs_new_protected:Npn \math_register_env:nn #1#2
+ {
+ \tl_set:Nn \l__math_env_name_tl {#1}
+ \keys_set:nn { __math } {#2}
+ \cs_gset_eq:cc { __math_env_ #1 _begin: } {#1}
+ \cs_gset_eq:cc { __math_env_ #1 _end: } { end #1 }
+ \ExpandArgs { nnx } \RenewDocumentEnvironment {#1} { b }
+ {
+ \exp_not:N \bool_if:NTF \exp_not:N \l__math_collected_bool
+ {
+ }
+ {
+ \cs_if_exist:cTF { __math_env #1 _aux: }
+ {
+ \exp_not:c { __math_env #1 _aux: }
+ ####1 \exp_not:N \__math_env_end: {#1}
+ }
+ { \exp_not:N \__math_process:nn {#1} {####1} }
+ \exp_not:n { \@kernel@math@registered@begin }
+ \bool_set_true:N \exp_not:N \l__math_collected_bool
+ }
+ \exp_not:c { __math_env_ #1 _begin: }
+ ####1
+ \exp_not:c { __math_env_ #1 _end: }
+ }
+ {
+ }
+ }
+
+\cs_set_protected:Npn \__cs_tmp:w #1
+ {
+ \group_begin:
+ \exp_args:No \__cs_generate_internal_variant:n
+ { \tl_to_str:n {#1} }
+ \group_end:
+ }
+\__cs_tmp:w { nnxx }
+
+\cs_new_protected:Npn \math_register_halign_env:nn #1#2
+ {
+ \tl_set:Nn \l__math_env_name_tl {#1}
+ \keys_set:nn { __math } {#2}
+ \cs_gset_eq:cc { __math_env_ #1 _begin: } {#1}
+ \cs_gset_eq:cc { __math_env_ #1 _end: } { end #1 }
+ \ExpandArgs { nnxx } \RenewDocumentEnvironment {#1} { b }
+ {
+ \exp_not:N \bool_if:NTF \exp_not:N \l__math_collected_bool
+ {
+ }
+ {
+ \cs_if_exist:cTF { __math_env #1 _aux: }
+ {
+ \exp_not:c { __math_env #1 _aux: }
+ ####1 \exp_not:N \__math_env_end: {#1}
+ }
+ { \exp_not:N \__math_process:nn {#1} {####1} }
+ \exp_not:n { \@kernel@math@registered@begin }
+ \bool_set_true:N \exp_not:N \l__math_collected_bool
+ }
+ \exp_not:c { __math_env_ #1 _begin: }
+ ####1
+ }
+ {
+ \exp_not:c { __math_env_ #1 _end: }
+ }
+ }
+
+\cs_new_protected:Npn \math_register_odd_env:nn #1#2
+ {
+ \tl_set:Nn \l__math_env_name_tl {#1}
+ \keys_set:nn { __math } {#2}
+ \cs_gset_eq:cc { __math_env_ #1 _begin: } {#1}
+ \cs_gset_eq:cc { __math_env_ #1 _end: } { end #1 }
+ \ExpandArgs { nnxx } \RenewDocumentEnvironment {#1} { b }
+ {
+ \exp_not:N \bool_if:NTF \exp_not:N \l__math_collected_bool
+ {
+ }
+ {
+ \cs_if_exist:cTF { __math_env #1 _aux: }
+ {
+ \exp_not:c { __math_env #1 _aux: }
+ ####1 \exp_not:N \__math_env_end: {#1}
+ }
+ { \exp_not:N \__math_process:nn {#1} {####1} }
+ \exp_not:n { \@kernel@math@registered@begin }
+ \bool_set_true:N \exp_not:N \l__math_collected_bool
+ }
+ \exp_not:c { __math_env_ #1 _begin: }
+ ####1
+ }
+ {
+ \exp_not:c { __math_env_ #1 _end: }
+ \exp_not:n { \@kernel@math@registered@end }
+ }
+ }
+
+
+\cs_new:Npn \@kernel@math@registered@begin {
+ \mode_if_vertical:TF
+ {
+ \exp_args:Noo\str_if_eq:nnF \g__tag_struct_tag_tl { \l__tag_para_main_tag_tl } % needs correction!
+ {
+ \__block_beginpar_vmode:
+ } % needs correction!
+ }
+ {
+ \@kernel@close@P
+ }
+ \@kernel@math@begin
+ \tagpdfparaOff
+}
+
+\cs_new:Npn \@kernel@math@registered@end {
+ \para_raw_end:
+ \tagpdfparaOn
+ \@kernel@math@end
+ \@endpetrue
+}
+
+\cs_new_protected:Npn \math_register_env:n #1
+ { \math_register_env:nn {#1} { } }
+\NewDocumentCommand \RegisterMathEnvironment { O{} m }
+ { \math_register_env:nn {#2} {#1} }
+\cs_new_protected:Npn \__math_env_forward:w #1 \__math_env_end: #2
+ { \__math_process:nn {#2} {#1} }
+\tl_gput_right:Nn \@kernel@before@begindocument
+ {
+ \math_register_env:n { equation }
+ \math_register_env:n { equation* }
+ \RenewDocumentEnvironment{math} {b}{$#1$}{}
+ \RenewDocumentEnvironment{displaymath} {b}{\[#1\]}{}
+ }
+\cs_gset_protected:Npn \( % \)
+ {
+ \bool_if:NTF \l__math_collected_bool
+ {
+ \mode_if_math:TF
+ { \@badmath }
+ { $ }
+ }
+ {
+ \bool_set_true:N \l__math_collected_bool
+ \__math_grab_inline:w
+ }
+ } % \(
+\cs_gset_protected:Npn \)
+ {
+ \mode_if_math:TF
+ { $ }
+ { \@badmath }
+ }
+\tl_gput_right:Nn \@kernel@before@begindocument
+ {
+ \cs_gset_protected:Npn \[ % \]
+ {
+ \bool_if:NTF \l__math_collected_bool
+ { \begin { equation* } }
+ { \__math_grab_eqn:w }
+ } % \[
+ \cs_gset_protected:Npn \]
+ {
+ \bool_if:NTF \l__math_collected_bool
+ { \end{ equation* } }
+ { \@badmath }
+ }
+ }
+
+\tl_new:N\tmpmathcontent
+
+\def\@kernel@math@begin {
+ \tl_gset:Nx\tmpmathcontent
+ {\exp_not:N\begin{\g__math_grabbed_env_tl}
+ \space
+ \exp_not:V\g__math_grabbed_math_tl
+ \space
+ \exp_not:N\end{\g__math_grabbed_env_tl}
+ }
+ \tagstructbegin{tag=Formula,
+ AFinline-o=\tmpmathcontent,
+ title-o=\g__math_grabbed_env_tl,
+ actualtext=\tmpmathcontent
+ }
+ \grabaformulapartandstart
+}
+\def\@kernel@math@end {
+ \tagmcend
+ \if@subformulas
+ \tagstructend
+ \else
+ \fi
+ \tagstructend
+}
+
+\exp_args:No \tex_everymath:D
+ {
+ \tex_the:D \tex_everymath:D
+ \bool_if:NF \l__math_collected_bool
+ {
+ \bool_set_true:N \l__math_collected_bool
+ \__math_grab_dollar:w
+ }
+ }
+\exp_args:No \tex_everydisplay:D
+ {
+ \tex_the:D \tex_everydisplay:D
+ \iftrue % this may have to be a settable flag!
+ \skip_set:Nn \belowdisplayskip {-\belowdisplayskip}
+ \skip_set:Nn \belowdisplayshortskip {-\belowdisplayshortskip}
+ \int_set:Nn \postdisplaypenalty {10000}
+ \group_insert_after:N \__math_tag_dollardollar_display_end:
+ \fi
+ \bool_if:NF \l__math_collected_bool
+ {
+ \bool_set_true:N \l__math_collected_bool
+ \__math_grab_dollardollar:w
+ }
+ }
+\math_register_env:n { eqnarray }
+\math_register_env:n { eqnarray* }
+\clist_map_inline:nn
+ { tabular }
+ {
+ \AddToHook{ env / #1 / begin }
+ { \bool_set_true:N \l__math_collected_bool }
+ }
+\cs_new_eq:NN \__math_m@th: \m@th
+\cs_gset_protected:Npn \m@th
+ {
+ \bool_set_true:N \l__math_collected_bool
+ \__math_m@th:
+ }
+
+\tl_gput_right:Nn \@kernel@before@begindocument {
+\renewenvironment{gather*}{%
+ \start@gather\st@rredtrue
+}
+{%
+ % \endgather
+ \math@cr \black@\totwidth@ \egroup
+ $$\ignorespacesafterend
+}
+\def\common@align@ending {
+ \math@cr \black@\totwidth@
+ \egroup
+ \ifingather@
+ \restorealignstate@
+ \egroup
+ \nonumber
+ \ifnum0=`{\fi\iffalse}\fi
+ \else
+ $$%
+ \fi
+ \ignorespacesafterend
+}
+\renewenvironment{alignat}{%
+ \start@align\z@\st@rredfalse
+}{%
+ \common@align@ending
+}
+\renewenvironment{alignat*}{%
+ \start@align\z@\st@rredtrue
+}{%
+ \common@align@ending
+}
+\renewenvironment{xalignat}{%
+ \start@align\@ne\st@rredfalse
+}{%
+ \common@align@ending
+}
+\renewenvironment{xalignat*}{%
+ \start@align\@ne\st@rredtrue
+}{%
+ \common@align@ending
+}
+\renewenvironment{xxalignat}{%
+ \start@align\tw@\st@rredtrue
+}{%
+ \common@align@ending
+}
+\renewenvironment{align}{%
+ \start@align\@ne\st@rredfalse\m@ne
+}{%
+ \common@align@ending
+}
+\renewenvironment{align*}{%
+ \start@align\@ne\st@rredtrue\m@ne
+}{%
+ \common@align@ending
+}
+\renewenvironment{flalign}{%
+ \start@align\tw@\st@rredfalse\m@ne
+}{%
+ \common@align@ending
+}
+\renewenvironment{flalign*}{%
+ \start@align\tw@\st@rredtrue\m@ne
+}{%
+ \common@align@ending
+}
+\renewenvironment{multline*}{\start@multline\st@rredtrue}
+{%
+ \iftagsleft@ \@xp\lendmultline@ \else \@xp\rendmultline@ \fi
+ \ignorespacesafterend
+}
+\def\measuring@true{\let\ifmeasuring@\iftrue\tag_stop:}
+ \math_register_halign_env:nn {align}{}
+ \math_register_halign_env:nn {align*}{}
+ \math_register_halign_env:nn {flalign}{}
+ \math_register_halign_env:nn {flalign*}{}
+ \math_register_halign_env:nn {gather}{}
+ \math_register_halign_env:nn {gather*}{}
+ \math_register_halign_env:nn {multline}{}
+ \math_register_halign_env:nn {multline*}{}
+ \math_register_halign_env:nn {xalignat}{}
+ \math_register_halign_env:nn {xalignat*}{}
+ \math_register_halign_env:nn {xxalignat}{}
+ %
+ \@namedef{maketag @ @ @} #1{%
+ \ifmeasuring@
+ \hbox{\m@th\normalfont#1}%
+ \else
+ \tagmcend \tagstructbegin{tag=Lbl}%
+ \tagmcbegin{tag=Lbl}%
+ \hbox{\m@th\normalfont#1}%
+ \tagmcend \tagstructend \tagmcbegin{}%
+ \fi
+ }
+ \def\intertext@{%
+ \def\intertext##1{%
+ \ifvmode\else\\\@empty\fi
+ \noalign{%
+ \penalty\postdisplaypenalty\vskip-\belowdisplayskip
+ \vbox{
+ \ifmeasuring@\tag_stop:\fi
+ \normalbaselines
+ \ifdim\linewidth=\columnwidth
+ \else \parshape\@ne \@totalleftmargin \linewidth
+ \fi
+ \tag_mc_end_push:
+ \tagpdfsetup{paratag=P}%
+ \tagpdfparaOn
+ \noindent\ignorespaces##1\par
+ \tag_mc_begin_pop:n{}}%
+ \penalty\predisplaypenalty\vskip\abovedisplayskip%
+ }%
+ }
+ }
+\@namedef{math@cr @ @ @ gather}{%
+ \ifst@rred\nonumber\fi
+ &\relax
+ \make@display@tag
+ \maybestartnewformulatag
+ \ifst@rred\else\global\@eqnswtrue\fi
+ \global\advance\row@\@ne
+ \cr
+}
+\@namedef{math@cr @ @ @ align}{%
+ \ifst@rred\nonumber\fi
+ \if@eqnsw \global\tag@true \fi
+ \global\advance\row@\@ne
+ \add@amps\maxfields@
+ \omit
+ \kern-\alignsep@
+ \iftag@
+ \setboxz@h{\@lign\strut@{\make@display@tag}}%
+ \place@tag
+ \fi
+ \maybestartnewformulatag
+ \ifst@rred\else\global\@eqnswtrue\fi
+ \global\lineht@\z@
+ \cr
+}
+\def\restore@math@cr{\@namedef{math@cr @ @ @}{
+ \maybestartnewformulatag
+ \cr}}
+\restore@math@cr
+}
+
+\cs_new:Npn \__math_split_at_nl_first:w #1 \\ #2 \\ #3 \s_stop
+ {
+ \quark_if_nil:nTF {#2}
+ { {#1} { } }
+ {
+ \__math_split_chk_if_begin:ww #1 \begin \q_nil \s_mark
+ #2 \\ #3 \s_stop
+ }
+ }
+\cs_new:Npn \__math_split_chk_if_begin:ww #1 \begin #2 #3 \s_mark
+ #4 \\ \q_nil \\ \s_stop
+ {
+ \quark_if_nil:nTF {#2}
+ { {#1} {#4} }
+ {
+ \exp_after:wN \__math_split_collect_one_end:w
+ \__math_split_cleanup_begin_q_nil:w #1 \begin{#2} #3 \\ #4 \s_stop
+ { } { 1 }
+ }
+ }
+\cs_new:Npn \__math_split_cleanup_begin_q_nil:w #1 \begin \q_nil {#1}
+\cs_new:Npn \__math_split_collect_one_end:w #1 \end #2 #3 \s_stop #4 #5
+ {
+ \exp_args:Nf \__math_split_check_count_begins:nnnn
+ { \__math_split_count_begins:n { #4 #1 } } {#5}
+ { #4 #1 \end{#2} } {#3}
+ }
+\cs_new:Npn \__math_split_count_begins:n #1
+ { \int_eval:n { 0 \__math_split_count_begins:w #1 \begin \q_nil } }
+\cs_new:Npn \__math_split_count_begins:w #1 \begin #2
+ { \quark_if_nil:nF {#2} { +1 \__math_split_count_begins:w } }
+\cs_new:Npn \__math_split_check_count_begins:nnnn #1 #2 #3 #4
+ {
+ \int_compare:nNnTF {#1} = {#2}
+ {
+ \exp_last_unbraced:Nf \__math_split_final_cleanup:nn
+ { \split:n { \__math_split_guard:n {#3} #4 } }
+ }
+ {
+ \exp_args:No \use_ii_i:nn
+ { \exp_after:wN { \int_value:w \int_eval:n { #2 + 1 } } }
+ { \__math_split_collect_one_end:w #4 \s_stop {#3} }
+ }
+ }
+\cs_new:Npn \__math_split_final_cleanup:nn #1 #2
+ {
+ \exp:w \__math_split_final_cleanup:w #1
+ \__math_split_guard:n \q_nil \s_mark { }
+ {#2}
+ }
+\cs_new:Npn \__math_split_final_cleanup:w #1 \__math_split_guard:n #2 #3 \s_mark #4
+ {
+ \quark_if_nil:nTF {#2}
+ { \exp_end: { #4 #1 } }
+ { \__math_split_final_cleanup:w #3 \s_mark { #4 #1 #2 } }
+ }
+\NewDocumentCommand \splitnl { mm +m }
+ {
+ \tl_set:Nf \l_tmpa_tl { \split:n {#3} }
+ \show \l_tmpa_tl
+ \exp_after:wN \__splitnl_aux:nnNN \l_tmpa_tl #1 #2
+ }
+
+\cs_new:Npn \split:n #1 {
+ \__math_split_at_nl_first:w #1 \\ \q_nil \\ \s_stop }
+
+\cs_new:Npn \__math_split_at_nl:NN #1#2 {
+ \tl_set:Nf \l_tmpa_tl {
+ \exp_after:wN \__math_split_at_nl_first:w #1 \\ \q_nil \\ \s_stop }
+ \exp_after:wN \__math_split_at_nl_aux:nnNN \l_tmpa_tl #1 #2
+}
+
+\cs_new_protected:Npn \__math_split_at_nl_aux:nnNN #1 #2 #3 #4
+ {
+ \tl_gset:Nn #4 {#1}
+ \tl_gset:Nn #3 {#2}
+}
+
+
+\newif\if@subformulas
+\tl_new:N \result
+
+\cs_new_protected:Npn\grabaformulapartandstart {
+ \__math_split_at_nl:NN \g__math_grabbed_math_tl \result
+ \typeout{====>first-result=\meaning\result}
+ \typeout{====>first-tmpmathcontent=\meaning\g__math_grabbed_math_tl}
+ \tl_if_empty:NTF \g__math_grabbed_math_tl
+ {
+ \typeout{====>formula~ has~ no~ subparts}
+ \global\@subformulasfalse
+ }
+ {
+ \typeout{====>formula~ has~ subparts}
+ \global\@subformulastrue
+ \edef\resulttitle{\g__math_grabbed_env_tl\space (part)}
+ \tagstructbegin{tag=Formula,
+ title-o=\resulttitle
+ }
+ }
+ \tagmcbegin{}
+}
+
+\cs_new_protected:Npn\grabaformulapartandmayberestart {
+ \__math_split_at_nl:NN \g__math_grabbed_math_tl \result
+ \typeout{====>result=\meaning\result}
+ \typeout{====>tmpmathcontent=\meaning\g__math_grabbed_math_tl}
+ \edef\resulttitle{\g__math_grabbed_env_tl\space (part)}
+ \tagstructbegin{tag=Formula,
+ alt=\result,
+ title-o=\resulttitle
+ }
+ \tagmcbegin{}
+}
+\def\maybestartnewformulatag {
+\if@subformulas
+ \ifmeasuring@\else
+ \tl_if_empty:NF \g__math_grabbed_math_tl
+ {
+ \tagmcend
+ \tagstructend
+ \grabaformulapartandmayberestart
+ }
+ \fi
+\fi
+}
+\ExplSyntaxOff
+
+\endinput
+%%
+%% End of file `latex-lab-mathtagging.ltx'.