# Math Formula on Wiki

Use this website for formula ${\displaystyle \operatorname {erfc} (x)={\frac {2}{\sqrt {\pi }}}\int _{x}^{\infty }e^{-t^{2}}\,dt={\frac {e^{-x^{2}}}{x{\sqrt {\pi }}}}\sum _{n=0}^{\infty }(-1)^{n}{\frac {(2n)!}{n!(2x)^{2n}}}}$

${\displaystyle {\pi }={\frac {3}{4}}{\sqrt {3}}+24{\int _{0}^{1/4}}{{\sqrt {x-x^{2}}}dx}}$

${\displaystyle {\sqrt {3x-1}}+(1+x)^{2}}$

${\displaystyle {\pi }r^{2}}$ ${\displaystyle 4{\pi }{\epsilon }r^{2}}$

How to write a matrix:

$\begin{matrix} a & b \\ d & e \end{matrix}$

The & sign separates columns and the "\\" separates the rows

${\displaystyle {\begin{matrix}a&b\\d&e\end{matrix}}}$

${\displaystyle s=ut+{\frac {1}{2}}(at^{2})}$

Chemical formula: Sulphuric Acid - ${\displaystyle H_{2}SO_{4}}$

${\displaystyle {\bar {a}}}$

${\displaystyle {\sqrt[{x}]{y}}}$

${\displaystyle \exists }$ ${\displaystyle \partial }$

## Demo

${\displaystyle {\sqrt {45}}}$  ${\displaystyle \sum _{x}}$  ${\displaystyle {\frac {\sum {x}}{n}}={\bar {x}}}$