Hello, miguel11795!

Welcome aboard!

You should learn to use LaTeX.

Near the bottom of the opening page click on "LaTeX Help".

You'll find a set of tutorials.

You type the code between [tex] and [/tex].

Some simple examples . . .

[tex]x^2-3x-10[/tex] returns:

[tex]\frac{x}{7}[/tex] returns:

[tex]\sqrt{x-4}[/tex] returns:

Have fun!