Eventually I decided to switch to Vim and LaTeX though (I was pretty new to both). The OP's setup looks much fancier than what I did, I just used pdflatex and mupdf. Diagrams I would draw by hand on paper.
I am grateful to have my notes in a nice clean searchable pdf now 10 years later, but unfortunately my career in software has yet to have me actually do differential equations again.
I have to ask because I miss it so dearly: is there any modern alternative to a 10" netbook like what I had back then? Besides the GPD win that was posted a few days ago. And I don't like the idea of a super expensive tablet with its heavy screen.
What do students take notes on now?