How difficult is Differential Equations and Discrete Math compared to Linear Algebra and Multivariable Calculus

[ucbalumnus]

@theMightyPham

I would be very grateful if anyone here can provide me some general ideas about the concepts that I will learn in DE and DM.

For discrete math, here is a course home page:
https://www.eecs70.org/

Here are some differential equations textbooks:
http://faculty.sfasu.edu/judsontw/ode/

Ordinary Differential Equations - Open Textbook Library

differential-equations.pdf