Just click the scratch cat, tell what power you'd liketo raise the binomial expression (a+b) to Pascal's triangle to, and you can solve your binomial expansion question in seconds!
I also made this when I was bored. I used the code from the Pascal's triangle project I posted the other day, and basically built up on it to make this. Binomial expansion is also a key concept in math, so credits to my math teacher again ig.