2x(x + 1)^2 - (x - 1)^3 - (x - 2)(x^2 + 2x + 4)

a, 2x(x+1)^2 -(x-1)^3 -(x-2)(x^2+2x+4)
b, (2x+3)(4x^2-6x+9)-2(4x^3-1)
c, (3x+5)^2 +(3x-5)2 - (3x+2)(3x-2)
d, (4x-1)^3 -(4x-3)(16x^2+3)
e, (x+2)^3 -2(x^2+6x-5)-8
g, (-x-3)^3 -(x+9)(x^2+27)
h, (x-1)^3 -(x+2)(x^2-2x+4)+3x^2 +2x