This mostly scientific site will certainly contain a lot of questions and answers with mathematical formulae. Can we have MathJax enabled here like on similar Signal Processing?

When enabled this will render as a formula:

$$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$$

Here is the code to create the formula:

$$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$$

See MathJax basic tutorial and quick reference.