(a + b)n
Peter, Peter, Peter. If we were your Algebra teacher, we’d either be crying in the bathroom wondering where we went wrong or give you an A. That’s now how you’re supposed to expand (a + b)n, but we don’t know the answer either, so yeah, we get where you’re coming from, Peter.
And if the equation could be expanded, why was it compressed (?) to begin with? On that point, if it was compressed from the beginning, why would you want to expand it and potentially make it more confusing? And why are there letters in math?! Letters belong in English class, not numbers class!