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lang-tex
\vfracusing\def\vfrac#1#2{\mathpalette\relax{\vfr@c{#1}{#2}}}or\def\vfrac#1#2{\mathpalette{\vfr@c{#1}{#2}}\relax}solve your problem?\hboxcontents do not get the correct size (now that I think about it, how could they). I should somehow be able to put the first argument to\mathpaletteas an argument to\vr@cI think.