Tìm x: (2x - 1)^3 - 4x^2(2x - 3) = 5

Tìm x
a) (2x-1)^3-4x^2(2x-3)=5
b) (x+4)^3-x^2(x+12)=17
c) 6(x+1)+2(x-1)(x^2+x+1)-2(x+1)^3=32