Expand using FOIL: (2x+3)(4x−1)(2x + 3)(4x - 1)(2x+3)(4x−1).
8x2+10x−38x^2 + 10x - 38x2+10x−3
8x2−10x−38x^2 - 10x - 38x2−10x−3
8x2+10x+38x^2 + 10x + 38x2+10x+3
8x2−38x^2 - 38x2−3