User:Renerpho/sandbox/Section header bug

Section titles look weird in the table of contents...

In header: $$q(\alpha)$$
That should be $$q(\alpha)$$.

This can be circumvented, by writing q(α)
Which looks good enough.

Not so simple with $$\sum_{n=0}^{\infty }\frac{x^n}{n!}$$
The exponential function $$\sum_{n=0}^{\infty }\frac{x^n}{n!}=e^x \forall x\in \mathbb{R}$$