Permutation OR Combination?

Its (3a)^4 + 4(3a)^3(-2) +6(3a)^2(-2)^2 + 4(3a)(-2)^3 + (-2)^4 = 81a^4 - 72a^3 + 216a^2-96a+16.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.