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\documentclass{article} \DeclareSymbolFont{yh}{OMX}{yhex}{m}{n} \DeclareMathAccent{\hu}{\mathord}{yh}{"F3} \begin{document} arc $AB$ is $\hu{AB}$, more $\hu{ABCDEF}$ \end{document}
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2025-6-5 01:40 GMT+8
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