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I seriously don't see any need for new note-taking software.

My notes (on paper) are almost never just text, they're a haphazard mix of text, mathematical notation and ad hoc diagrams/graphs/flowcharts etc. If someone could design note taking software that worked for this style of note taking, I'd happily hand over my money.

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Not the OP, but here's an idea:

A math-centric piece of software that allows you to write in equations via a stylus, then converts these to working equations. So, you write down the quadratic equation and can define in the software what a and b are, then solve for x.

There has to be something similar to this already.

You'd want it just as an interface for Mathematica or similar programs. I did a bit of googling and can't find anything that exists.

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