$…$,行間 $$…$$ 或 \[…\]。\alpha \beta,上下標 ^ _,分式 \frac{}{},根號 \sqrt{}。\section、\begin{itemize}、\begin{tabular}、\begin{equation}。# $ % & _ { } ~ ^ \ 需轉義。LaTeX Symbol & Command Cheat Sheet - Search common LaTeX math symbols and commands, see the notation and click to copy. Free, browser-only.