This post is used for testing mathjax(latex) support.
Inline math
Use $...$
, example:
1
 $\lim_{x \to \infty} \exp(x) = 0$

Writing LaTex like:
Use $$...$$
, example:
1
 $$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$$

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 $$ \begin{matrix} 1 & x & x^2 \\ 1 & y & y^2 \\ 1 & z & z^2 \\ \end{matrix} $$

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 \begin{align} \sqrt{37} & = \sqrt{\frac{73^21}{12^2}} \\ & = \sqrt{\frac{73^2}{12^2}\cdot\frac{73^21}{73^2}} \\ & = \sqrt{\frac{73^2}{12^2}}\sqrt{\frac{73^21}{73^2}} \\ & = \frac{73}{12}\sqrt{1  \frac{1}{73^2}} \\ & \approx \frac{73}{12}\left(1  \frac{1}{2\cdot73^2}\right) \end{align}

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 \begin{array}{clcr} n & \text{Left} & \text{Center} & \text{Right} \\ \hline 1 & 0.24 & 1 & 125 \\ 2 & 1 & 189 & 8 \\ 3 & 20 & 2000 & 1+10i \end{array}

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