2w(4w^2 - 2w) + 3w(-2w^2 + 8w)
First distribute 2w and 3w(you do this by multiplying them to all values inside the parentheses):
8w^3 - 4w^2 - 6w^3 + 24w^2
Now simplify by adding/subtracting like terms:
8w^3 - 6w^3 = 2w^3
-4w^2 + 24w^2 = 20w^2
So we have:
2w^3 + 20w^2
