I use goodreader for reading scientific papers in pdf format. I frequently need to copy some math equations from the pdf file, copy it to some writing pad and make some derivations/calculations on the pad. What I need are the following:
1-A good writing pad program and a good stylus that I can work with math equations on, preferably math equations that are copy and pasted from Goodreader
2-Capability of going back and forth between Goodreader and the writing pad. Even better if I can view them in split screen.
I was wondering what your recommendation is for the writing pad program and the stylus.