>I always found it boring and a pain to write some mathematical formulaes in latex. Mainly those with a lot of \frac{x}{Y} stuff.

:)

This is what keybinds were invented for. I feel really silly for saying this but I made a huge list of custom keybinds only then finding out that the default keybinds in Vim-LaTeX-Suite are super good.

For example

>`/

backtick slash, expands to

>\frac{<++>}{<++>}<++>

where <++> are so called bullets that you can jump to with <C-j>. Another example

>`a

expands to

>\alpha

and all the other letters work as well (`b to \beta, `g to \gamma, etc.). Look into it, it makes typing LaTeX a breeze!