Not so much with respect to Maths: either you integrate volumes or you do not, and the theory is essentially “dumb”. As long as you know what a derivative is,

Not so much with respect to Maths: either you integrate volumes or you do not, and the theory is essentially “dumb”. As long as you know what a derivative is, all integral and vector calculus is just a comination of “look at the problem with an infinite loupe and then add all those values “. DiffEq is more or less similar. Classical maths was very well taught: examples and applications galore.