效果

原整理于洛谷，2025/3/25 移植。

$$\begin{gather*} {\color{#CF6}\Huge\bigcirc}\kern{-33px} \color{#9D3} \stackrel{\tiny\text{Adventure Rank}}{\Large 65} \\ \stackrel{\scriptsize\tt 295229520 \mathop{/} 332133210} {\scriptsize\color{#888}\diamond\ \ \color{#CF6}\rule{80px}{3px}\color{#CCC}\rule{10px}{3px}\ \color{#888}\diamond} \\ \small\tt\color{#999}Adventure\ EXP+\!998244353 \end{gather*}$$

提示

• 在 KaTeX 中，\kern 的参数为 -33px.
• 在 MathJax 中，\kern 的参数为 -50px.

$$\begin{array}{c|c} \hline \text{text} & \text{math / 文字效果} \\\hline \textrm{rm} & \mathrm{ 1234567890abcxyz} \\\hline \textbf{bf} & \mathbf{ 1234567890abcxyz} \\\hline \texttt{tt} & \mathtt{ 1234567890abcxyz} \\\hline \textsf{sf} &\mathsf{ 1234567890abcxyz} \\\hline \textit{it} &\mathit{ 1234567890abcxyz} \\\hline \end{array}$$

$$\begin{array}{l|l} \hline \texttt{\textbackslash kern\{2em\}} & 1\kern{2em}2 \\\hline \texttt{\textbackslash kern\{-10px\}} & 1\kern{-10px}2 \\\hline \texttt{\textbackslash hphantom\{666\}} & \substack{\normalsize 1\hphantom{666}2 \\ \normalsize 16662} \\\hline \end{array}$$

$$\begin{array}{l|c} \texttt{\textbackslash stackrel\{1\}\{2\}} & \stackrel{1}{2} \\\hline \texttt{\textbackslash stackrel\{\textbackslash large\{1\}\}\{2\}} & \stackrel{\large{1}}{2} \\\hline \texttt{\textbackslash substack\{1 \textbackslash \textbackslash 2}\} & \Large\substack{1 \\ 2} \end{array}$$

text style: $\textstyle \sum_i\frac{1}{2}$

display style: $\displaystyle \sum_i\frac{1}{2}$

\dfrac: $\dfrac{1}{2}$

*行内使用 display style 如果不新建段落的话可能会和相邻行重叠

宏包

我大费周章把 KaTeX 换成 MathJax 就是为了这个口牙！

upd: 发现 KaTeX 有打开 mhchem 的设置，成小丑了

各种箭头

$$\begin{gather*} \texttt{amsmath} & \xrightarrow[below]{above} \quad \xlongequal{text} \quad \xtwoheadrightarrow{text} \\ \texttt{extpfeil} & \xrightleftharpoons[below]{above} \end{gather*}$$

$$
\begin{gather*}
\texttt{amsmath} & \xrightarrow[below]{above} \quad
\xlongequal{text} \quad
\xtwoheadrightarrow{text}
\\
\texttt{extpfeil} & \xrightleftharpoons[below]{above}
\end{gather*}
$$

化学方程式

$$\begin{gather*} \ce{Cu + SO4^2-(\text{浓}) + 4H+ ->[\Delta] Cu^2+ + SO2 ^ + 2H2O} \\ \ce{C2H5OH + CH3COOH <=>[\text{浓}H2SO4][\Delta] CH3COOC2H5 + H2O} \\ \ce{<=>>} \quad \ce{<<=>} \\ \ce{CuSO4*5H2O} \end{gather*}$$

$$
\begin{gather*}
\ce{Cu + SO4^2-(\text{浓}) + 4H+ ->[\Delta] Cu^2+ + SO2 ^ + 2H2O}
\\
\ce{C2H5OH + CH3COOH <=>[\text{浓}H2SO4][\Delta] CH3COOC2H5 + H2O}
\\
\ce{<=>>} \quad \ce{<<=>}
\\
\ce{CuSO4*5H2O}
\end{gather*}
$$