Question

How do you combine like terms in `-1 + 6x^3 + 2y^3 + 2 - 1 - 5x^3 - 6y^3`?

Answer 1

It is

`-1 + 6x^3 + 2y^3 + 2 - 1 - 5x^3 - 6y^3=(-1+2-1)+(6x^3-5x^3)+(2y^3-6y^3)=0+x^3-4y^3=x^3-4y^3`