Simplify each expression, and then arrange them in increasing order based on the coefficient of n^2 .#Need help ASAP !

increasing order based on coefficient of n^2....

-5(n^3 - n^2 - 1) + n(n^2 - n) <=== this goes in the first box (the top one)
-5n^3 + 5n^2 + 5 + n^3 - 1
-4n^3 + 5n^2 + 4

(n^2 - 1)(n + 2) - n^2(n - 3) <=== this goes in the third box
n^3 + 2n^2 - n - 3 - n^3 + 3n^2
5n^2  - n - 3

n^2(n - 4) + 5n^3 - 6 <=== this goes in the forth box (bottom box)
n^3 - 4n^2 + 5n^3 - 6
6n^3 - 4n^2 - 6

2n(n^2 - 2n - 1) + 3n^2 <=== this goes in second box
2n^3 - 4n^2 - 2n + 3n^2
2n^3 - n^2 - 2n