When I was in college, I used Grapher on Mac OS X to take all my math notes. It was very quick and used some LaTeX-like keyboard shortcuts. I'd copy the equatio

When I was in college, I used Grapher on Mac OS X to take all my math notes. It was very quick and used some LaTeX-like keyboard shortcuts. I'd copy the equations I generated into TextEdit (side note: I still miss the RTFD bundle format now that I use Windows and Linux). No doubt my professors thought I was just dicking around because I was the only person taking notes on a laptop but it was very nice and the results were much more legible than my handwritten notes.