How do you remove parentheses from a problem?

Answer 1

Perform the mathematical operations, starting with the innermost set of parentheses and working out to the most inclusive set.

Y2 + Z(X - 2(Y +1))

Clearing the inside set:

Y2 + Z(X - 2Y + 2)

Then clear the outer set:

Y2 + ZX - 2ZY +2Z