twitter-clone

A twitter clone for cscd322 class

Want to be sure Latex works here

$$P \left( A=2 , \middle| , \dfrac{A^2}{B}>4 \right)$$

$$\mathrm{e} = \sum_{n=0}^{\infty} \dfrac{1}{n!}$$

$$ A_{m,n} = \begin{pmatrix} a_{1,1} & a_{1,2} & \cdots & a_{1,n} \\ a_{2,1} & a_{2,2} & \cdots & a_{2,n} \\ \vdots & \vdots & \ddots & \vdots \\ a_{m,1} & a_{m,2} & \cdots & a_{m,n} \end{pmatrix} $$