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

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

7p^2 + 2 + 8p^2 - 3 - p^4 + 9p^4 + 6

7p^2+ 8p^2 - 3 + 2+ 6 - p^4 + 9p^4

15p^2 +5 + 8p^4