Throughout college, I made a bunch of guides or "cheat sheets" for my engineering classes to help me study for tests. I've uploaded PDF versions as references for anyone who wants to use them! Hopefully I can type them up at some point as well.
Advanced Optimization
Data Structures and Algorithms
Differential Equations
Latin Grammar
Linear Optimization
Machine Learning
Multivariate Calculus
Signals and Systems
Stochastic Processes