How I got a CS degree without learning what a system call is: http://jvns.ca/blog/2016/09/12/how-i-got-a-cs-degree-without...
very roughly: 1. groups & rings, 2. linear algebra, 3. more groups & monoids & rings, 4. galois theory
for the analysis classes, very very roughly:
1. basics of analysis, the derivative, 2. the riemann integral, 3. metric spaces, 4. the lebesgue measure & integration