Expand: (2x+1)3(2x + 1)^3(2x+1)3.
8x3+12x2+6x+18x^3 + 12x^2 + 6x + 18x3+12x2+6x+1
8x3+18x^3 + 18x3+1
6x3+12x2+6x+16x^3 + 12x^2 + 6x + 16x3+12x2+6x+1
8x3+6x2+12x+18x^3 + 6x^2 + 12x + 18x3+6x2+12x+1