F (x) = (2x^3 - 4)^4

f'(x) = 4(2x^3 - 4)^3 6x^2
f'(x) = 24x^2 (2x^3 - 4)^3

perlu di ingat

f(x) = a (bx^n - c)^m

f'(x) = am(bx^n - c)^(m-1) nbx^(n-1)