(0,4x^6-5)(5x^3+2)-x^3(2x^6+0,8x^3-25)

Question

(0,4x^6-5)(5x^3+2)-x^3(2x^6+0,8x^3-25)

Answer 1

....=2х^9+0,8х^6-25х^3-10-2х^9-0,8х^6+25х^3=-10