Idea is to add enough constraints to the function so that inverting it is non trivial (where inverts finds ANY input). Like the video said inverting multiplicat

Idea is to add enough constraints to the function so that inverting it is non trivial (where inverts finds ANY input). Like the video said inverting multiplication with the output of 15 could yield 15 = 15 * 1, so just make the function f(a, b) = a * b where a > 1 and b > 1 for a more interesting RSA-breaking case.