LaTex学习
https://www.jianshu.com/p/e6d2368e451a
\[\\
\]
\(2x+3y=34\)
\[\\
\]
\[2x+3y=34
\\
2x+3y=\frac{1}{3}
\]
\[\sqrt[3]{x}=\sqrt{y}
\]
\[\Longrightarrow
\\
\Longleftarrow
\]
求和
\[\sum_{i=1}^n i^2
\\
\\
\begin{matrix} \sum_{i=1}^n i^2 \end{matrix}
\\
\\
\sum\limits_{d|n} a_d \ * \ a_\frac{n}{d}
\]
