@user21820 That reminds me on how our biology high school teacher taught us the logic behind a process called transpiration thus helping us to derive it in case we forgot in exams

@AlessandroCodenotti I do not know the answer, even though I think such examples should definitely exist. Why don't you post on Math SE and link to your question from here? =)

I'm probably going to, I was wondering if someone here had an example from the top of their head

@user21820 Hello! We miss you/I miss you!