You have to add all of those terms?! Wow! I'll try my best not to miss any, but you have to combine all like terms.
-7gˆ4 - 4gˆ4 - 4gˆ4 - 3gˆ4 = -18gˆ4
4gˆ3 - 3gˆ3 = 1gˆ3
-3gˆ2 + 4gˆ2 + 4gˆ2 = 5gˆ2
5g + 5g + 14g + 14g = 38g
-3 + 3 - 6 - 6 = -12
-18gˆ4 + gˆ3 + 5gˆ2 + 38g - 12
