Quadratic Formula
x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}
Einstein's Equation
E = mc^2
Definite Integral
\int_{a}^{b} f(x) \, dx
Sum Formula
\sum_{i=1}^{n} i = \frac{n(n+1)}{2}
Limit
\lim_{x \to \infty} \frac{1}{x} = 0
Matrix
\begin{pmatrix} a & b \\ c & d \end{pmatrix}