They’re called integrals, so it should be no surprise that they’re integral.

the real chain rule

This but going the “other direction” for me.

Learning maths has mostly consisted of a repetition of me thinking for a brief moment “yay! I know how to differentiate functions”, only to discover later a more general/different setting in which it was clear that no, I did not, in fact, know how to differentiate functions.

See I’m an engineering major but on opposite day, like all the time. I’m unironically like “please I beg you just let me do more integrals, I don’t wanna build the prototype, I just want to do all the math to control it.” So whenever it’s just more integrals I’m like “Finally some fucking good food” 😆