Alright, that I can do. I meant more, that there is a big difference between knowing everything by heart and comprehend everything easily and having to look it

Alright, that I can do. I meant more, that there is a big difference between knowing everything by heart and comprehend everything easily and having to look it up and stare at some formula a bit. Math is a rabbit hole, like, you can do integrals, then line integrals, triple integrals and it goes on. For me it isn't also very clear until where it is useful to learn math. I'm also more on the practical/software engineering side, so I don't even have intentions of doing research. I just want to follow the most up to date methods.