[Jensson]

What calculus class did you take? I don't think that there are many calculus classes where computation is a significant part. Rather you learn how to work with and translate equations, but there is little about methods for manually calculating integrals or derivatives by hand with different approximation methods etc. Basically nobody learns that properly today. And the tiny part of the course is the part where you learn and get intuition for the "Area under curve" concept, which is extremely important for basically everything.