Multiply: x2(x3+4)x^2(x^3 + 4)x2(x3+4).
x5+4x2x^5 + 4x^2x5+4x2
x6+4x2x^6 + 4x^2x6+4x2
x5+4x^5 + 4x5+4
x2+4x^2 + 4x2+4