I've found LaTeX pretty practical. Not quite as easy as handwriting, but practical enough. Once I got enough practice I have access to the documents everywhere,

I've found LaTeX pretty practical. Not quite as easy as handwriting, but practical enough. Once I got enough practice I have access to the documents everywhere, don't have to worry about my horrible handwriting, and can copy-paste equations into Wolfram Alpha to check correctness. An editor with customizable key commands helps too. Took me about two months to get fast enough, but now I use LaTeX for basically all note taking and homework.