Yesterday I discovered that a lot of math symbols are in unicode and are available in regular text without LateX. This is great news, but I also need a good way to type them in vim. Vim is full of surprises and as it turns out, this is already built in via a feature called digraph. Not sure how that exactly works yet, but I figured out key combos for some useful symbols. In insert mode, you can access these symbols through ^K. This will enter a ? which is just a placeholder. Now type one of the combinations below and get beautiful math symbols!

Symbol Keys
+Z
*P
->
<-
=>
<=
± +-
TE
FA
AN
OR
=<
>=

These are the ones I found most useful, because they allow me to add small formulas to text notes without LateX. From within vim you can access the full list by typing :h digraphs-default. Have fun!