TeX help

Some TeX examples.

Fractions

$\frac{a}{b}$

\frac{a}{b}

Symbols

$\alpha$	\alpha
$\beta$	\beta
$\gamma$	\gamma
$\rightarrow$	\rightarrow
$\sim$	\sim
$45^\circ$	45^\circ
$\vec a$	\vec a

Functions

	a^b
$a^{b+c}$	a^{b+c}
	a_b
$\sin(\alpha)$	\sin(\alpha)
$\cos(\beta)$	\cos(\beta)
$\tan(\gamma)$	\tan(\gamma)
$\sqrt{5}$	\sqrt{5}
$\sqrt[3]{5}$	\sqrt[3]{5}
$\log_{a}(x)$	\log_{a}(x)

More examples at wikipedia