Quotient rule derivatives need help

I am confused on this derivative problem and would appreciate some guidance on this problem:

find derivative :

f(x) = (2x^7 - x^2) (x - 1 ) / (x +1)

*Use 2 rules it says

Thanks in advance!

f(x) = (2x^7 - x^2) (x - 1 ) / (x +1)
f'(x)={(x+1)[(2x^7-x²)+(x-1)(14x^6-2x)…‡