Latex support is based on MathJax.
Enclose the LaTex formula in $$...$$. Some examples:
| \(y^{x}\) |
y^{x} |
\(y_{x}\) |
y_{x} |
| \(\frac{x}{y}\) |
\frac{x}{y} |
\(\sum_{k=1}^n\) |
\sum_{k=1}^n |
| \(\sqrt[n]{x}\) |
\sqrt[n]{x} |
\(\prod_{k=1}^n\) |
\prod_{k=1}^n |
See more examples at here