I made something similar for node/web, not so complete, but good. It can also create windows in the OS using SDL

Check the docs and examples

https://github.com/pedroth/tela.js

"I have long struggled with understanding what probability-generating functions are and how to intuit them. There were two pieces of the puzzle missing for me, and we’ll go through both in this article."

Great article. For more, I really recommend Analytic Combinatorics:

https://ac.cs.princeton.edu/home/

Second this. This class is a classical example of conceptual blockbuster. Once one learns it, the complexity analysis of algorithms will never be the same again. In general, if a techie wants to spend their spare time learning new stuff, they will be better off focusing more on such conceptual stuff, as the return will compound over the years.

View nabladown files(markup language for math and code) as you type them.

Better to play here than in real life !!