Need answer checked for polynomial simplification

[silverdragon316]

(6m^3 -3m^2n +5mn^2 -2n^3) + (6mn^2 +n^3 -3m^3 +5m^2n)

is the answer 3m^3 + 2m^2n + 11mn^2 -n^3

 

[morson]

If you only want a quick answer check, then yes you're right.