--- 这里是 cjiaw 的小窝(●'◡'●) ---
正在玩命加载中......
$$
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Self-defined math definitions
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Math symbol commands
\newcommand{\intd}{\,{\rm d}} % Symbol 'd' used in integration, such as 'dx'
\newcommand{\diff}{{\rm d}} % Symbol 'd' used in differentiation
...
$$
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