Question

is this right?

Answer 1

i think so but you can use demos for questions like these :]

Answer 2

@dude

Answer 3

not sure if u ever got the answer but this is it −38y5z3+45x2y2z2
!

Answer 4

That looks correct to me it would indeed be \( \boxed{\ \left(45x^2-38y^3z\right)y^2z^2 \ } \)

Answer 5

let me try it.

Answer 6

yes i did it riht yay