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\catcode`\@=11
\def\nref#1{\nolabel@\nref{#1}\relax
\DNii@##1~##2~##3~##4\nextii@{##3}%
\csL@{#1}\expandafter\nextii@\Next@\nextii@\fi}
\def\pref#1{\nolabel@\pref{#1}\relax
\DNii@##1~##2~##3~##4~##5\nextii@{##4}%
\csL@{#1}\expandafter\nextii@\Next@\nextii@\fi}
\def\Evaluatenref#1{\nolabel@\Evaluatenref{#1}{\gdef\Nref{-10000 }}%
\DNii@##1~##2~##3~##4\nextii@{\DNii@{##3}}%
\csL@{#1}\expandafter\nextii@\Next@\nextii@
\xdef\Nref{\nextii@}\fi}
\def\Evaluatepref#1{\nolabel@\Evaluatepref{#1}{\global\let\Pref\empty}%
\DNii@##1~##2~##3~##4~##5\nextii@{\DNii@{##4}}%
\csL@{#1}\expandafter\nextii@\Next@\nextii@
\xdef\Pref{\nextii@}\fi}
\catcode`\@=\active
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