TEX

Inline formula : $a_2 = \sin(x)$
Displayed formula : $$\sum_{i=1}^n \prod_0^1 a_i^2$$
Fraction : $\frac{1}{1+x}$
Square root : $\sqrt{\alpha+1}$
Root : $\sqrt[3]{\Gamma-|1+x|}$
Sets : $x\not\in A\cap B \cup C \subseteq D = \emptyset = \lbrace x \mid x \text{ is even} \rbrace$
Limit : $\displaystyle \lim_{n\to \infty} a_n$
Relations : $\le \ge$
Arrows : $\to \Rightarrow$
Cases : $$f(x)= \begin{cases} x^{y+2}+2x, & \text{if}\qquad x \le -1 \cr \int x dx + c, & \text{if}\qquad x > -1 \end{cases}$$
Table :

A	B
$\sqrt{2}$	3