Which expression is equivalent to (x+2)2(x+2)^2(x+2)2?
x2+4x^2 + 4x2+4
x2+2x+4x^2 + 2x + 4x2+2x+4
x2+4x+4x^2 + 4x + 4x2+4x+4
x2+4x+2x^2 + 4x + 2x2+4x+2