## How to write math formulas in Constellab reports or stories?

Like Constellab reports, all stories in Constellab Community support writing mathematical formulas. This is quite similar to writing formulas in LaTex. The engine used to render formulas in Constellab is KaTex. KaTex is a fast library for typing any mathematical formula in web browsers.

Please find here the complete list of commands to enjoy KaTex!

Also find below some demonstrations of formulas:

## Fraction

This an example to write a symbolic fraction

```
x = {-b \pm \sqrt{b^2-4ac} \over 2a}
```

## Matrix

```
\begin{pmatrix}
a & b \\
c & d
\end{pmatrix}
```