4 (x - 2)
(x - 1*2)^4
1*(x - 2)
4 3 2 16 + x - 32*x - 8*x + 24*x
16 + x^4 - 32*x - 8*x^3 + 24*x^2
16.0*(-1 + 0.5*x)^4