Question

Помогите!!!!!!!
Упростите упражнение:
6/m^3+1/2m+m^2
12/x^2+12x+36+12/x^2-36-1/x-6
2x/x-1+3x+1/1-x^2-3/x+1
X+2-x^2+4/x-2
M-n/2mn+2/m-n
7p+q/p^2-pa+p+7q/q^2-pq