[gowld]

> hint: raising something to e

raising e to something

> is converted into another function where it's not nonsensical to do such a thing.)

That function is the power series expansion, taught in your calculus class. https://en.wikipedia.org/wiki/Matrix_exponential

> CLEARLY superior to the instruction I received at a tier 1 research institution.

3B1B is a tier 1 educational institution.

But also, videos often feel better than classes, because videos don't have homework, so you don't actually have your feeling of understanding tested.