There are a lot of "fancy" packages tailored to latex and formulas like vim-latexsuite, that set up place holders that you can navigate around and whatnot. But

There are a lot of "fancy" packages tailored to latex and formulas like vim-latexsuite, that set up place holders that you can navigate around and whatnot. But even without all that, a very basic thing that you can do is move around the matching pairs of braces (and brackets, and other paired things) using % If you do not want to move, but only see where the matching brace is, you can "set showmatch" and it will flash the matching brace when your cursor passes through the other one. This is really helpful for writing nested formulas (although a better strategy is to add a lot of newlines and whitespace so that the structure of your formulas is clear).