Katex数组
\begin{array}{|r c:c:c:c|}\hline
基础符号 & \lt & \gt & \le & \ge \\\hline
& \ne & \equiv &\not\equiv &\not1\\\hdashline
& \times & \div & + & - \\\hline
& \sqrt{2} & \frac{1}{2} & 2^2 & 2_2 \\\hline
\end{array}
[math]
\begin{array}{|r c:c:c:c|}\hline
基础符号 & \lt & \gt & \le & \ge \\\hline
& \ne & \equiv &\not\equiv &\not1\\\hdashline
& \times & \div & + & - \\\hline
& \sqrt{2} & \frac{1}{2} & 2^2 & 2_2 \\\hline
\end{array}
[/math]
