My name is David from Colorado. I am an undergraduate studying Applied Mathematics at an engineering school. I joined the forum to talk to people who love math as much as me. I look forward to chatting about math. Thanks!
Welcome to the forum!
In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.