Test post.

Some MathJax:

This is something: $x^2$.

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

$$\Phi(xz,1,a)=\sum_{k=0}^\infty \frac{(xz)^k}{a+k}$$

$$\begin{align} x^2 \\ y^2 \\ \end{align}$$

$$\begin{align} x^2 \\ y^2 \\ \end{align}$$

$$\begin{align} x^2 \\ y^2 \\ z^2 \\ \end{align}$$