\input{umtest-preamble} \usepackage{unicode-math} \setmathfont[Colour=FF0000]{xits-math.otf} \begin{document} \ExplSyntaxOn [$\l_um_mathstyle_tl$]\ [$\mathrm{\l_um_mathstyle_tl}$]\ [$\mathup{\l_um_mathstyle_tl}$]\ [$\mathit{\l_um_mathstyle_tl}$] [$\mathbf{\l_um_mathstyle_tl}$]\ [$\mathbfit{\l_um_mathstyle_tl}$]\ [$\mathbfup{\l_um_mathstyle_tl}$] [$\mathsf{\l_um_mathstyle_tl}$]\ [$\mathsfit{\l_um_mathstyle_tl}$]\ [$\mathsfup{\l_um_mathstyle_tl}$] [$\mathbfsf{\l_um_mathstyle_tl}$]\ [$\mathbfsfit{\l_um_mathstyle_tl}$]\ [$\mathbfsfup{\l_um_mathstyle_tl}$] \end{document}