Question 6437
(2n^6 - 4n + 4n^5) + (6n^5 + 8n^6 + 7n)
 2n^6 - 4n + 4n^5 + 6n^5 + 8n^6 + 7n
 10n^6 + 10n^5 + 3n  (Ans)