juststephen

Basic Mathematical Symbols

\frac{numerator}{denominator}

\int		% For just an integral sign without limits
\int_{Lower Limit}^{Upper Limit}

\sum		% For just a sum sign without limits
\sum_{Lower Limit}^{Upper Limit}

\sqrt{}
\sqrt[]{}	% Within the [] you can put the power

\left(		% Left bracket
\right)		% Right bracket

\cdot		% Other than \times
\times

\text{}
\textbf{}
\textit{}

\pm			% Plus Minus Sign
\leq		% Less or equal
\geq		% Greater or equal
\approx		% Approximate

\sin
\cos
\tan

\begin{array}
	Matrix	% Same as a table, used for matrices
\end{array}

\!			% Negative Space
\,			% Normal Space
\:			% Medium space
\;			% Big space

More information can be found on the LaTeX wiki over here!

Greek Alphabet

\alpha
\beta
\gamma
\delta
\epsilon \varepsilon
\zeta
\eta
\theta \vartheta
\iota
\kappa
\lambda
\mu
\nu
\xi
o O		% omicron
\pi
\rho\varrho
\sigma
\tau
\upsilon
\phi \varphi
\chi
\psi
\omega