Ooh! I think I may have invented those.
It’s actually very simple. You have a text object in the bottom corner (0,0), and you make clones of it going up the y axis. Then you have each clone:
Move forward 2
You can replace X*Y with whatever formulas you want - you can get good results just by randomly making formulas, although in my projects I hid some nods to famous formulas and theorems