Some math: $x^3$
Some displayed math:
$$
\frac{1}{8} \, {\left(\left(i + 1\right) \, \sqrt{2} \text{erf}\left(\left(\frac{1}{2} i + \frac{1}{2}\right) \, \sqrt{2} x\right) + \left(i - 1\right) \, \sqrt{2} \text{erf}\left(\left(\frac{1}{2} i - \frac{1}{2}\right) \, \sqrt{2} x\right)\right)} \sqrt{\pi}
$$
A big matrix:
$$
\left(\begin{array}{rrrrrrrrrr}
1 & -1 & -\frac{1}{2} & \frac{1}{2} & 1 & 0 & 1 & -2 & \frac{1}{2} & 2 \\
1 & -2 & 0 & 1 & -\frac{1}{2} & 0 & 1 & 0 & -1 & 0 \\
2 & 0 & 1 & 0 & 1 & 0 & 2 & 2 & \frac{1}{2} & -2 \\
-1 & 2 & 1 & -2 & 1 & 0 & -1 & 0 & 2 & \frac{1}{2} \\
0 & 0 & 0 & -2 & -2 & -1 & 2 & 2 & 0 & 0 \\
-1 & -1 & 0 & -1 & -2 & 1 & 0 & 0 & \frac{1}{2} & 2 \\
1 & 0 & -1 & 2 & 1 & 2 & -1 & -1 & 0 & -2 \\
0 & 0 & -2 & 0 & 0 & -2 & -1 & -2 & 1 & 1 \\
1 & -2 & 1 & 2 & 1 & 1 & \frac{1}{2} & 0 & 0 & 0 \\
-1 & -2 & -1 & 1 & 0 & 1 & -2 & -2 & 0 & -\frac{1}{2}
\end{array}\right)
$$