The speed of light squared is given by \(E = mc^2\)

The quadratic formula is:

\[x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\]

An integral example:

\[\int_0^\infty e^{-x^2} dx = \frac{\sqrt{\pi}}{2}\]

A matrix example:

\[\begin{bmatrix} 1 & 2 \\ 3 & 4 \end{bmatrix}\]