The cube of the sum of x and 4?

(x + 4)^(3) =

(x + 4)(x + 4)(x + 4) =

(x^(2) + 8x + 16)(x + 4) =

x^(3) + 8x^(2) + 16x + 4x^(2) + 32x + 64) =

x^(3) + 12x^(2) + 48x + 64

Done!!!!!