答案1
请尝试一下这个:
\documentclass{article}
\usepackage{physics}
\usepackage{MnSymbol}
\makeatletter
\DeclareSymbolFont{spllargesymbols}{OMX}{cmex}{m}{n}
\SetSymbolFont{spllargesymbols}{bold}{OMX}{cmex}{b}{n}
\DeclareMathDelimiter{(}{\mathopen}{letters}{46}{spllargesymbols}{0}
\DeclareMathDelimiter{)}{\mathclose}{letters}{47}{spllargesymbols}{1}
\makeatother
\begin{document}
$ \qty(\frac{2}{3}) $
\end{document}
输出