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Support OPTIONAL ARGUMENT in user defined macro by \newcommand · Issue #2228 · KaTeX/KaTeX · GitHub
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Make LaTeX easier with custom commands – Water Programming: A Collaborative Research Blog
TUGboat, Volume 42 (2021), No. 1 41 \NewDocumentCommand versus \newcommand versus ... Joseph Wright Creating new document comman
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Support OPTIONAL ARGUMENT in user defined macro by \newcommand · Issue #2228 · KaTeX/KaTeX · GitHub
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Macros
How to use \newcommand in LaTeX?
