(6h^4 + 4) + (5h^4 - 3 - 9h^2) + (7h^2 - 8h + 2)

(6h^4 + 4) + (5h^4 - 3 - 9h^2) + (7h^2 - 8h + 2)

6h^4 + 4 + 5h^4 - 3 - 9h^2 + 7h^2 - 8h + 2

6h^4+ 5h^4 + 4- 3+ 2 - 9h^2 + 7h^2 - 8h

11h^4 +3 - 2h^2 - 8h