Simplify: (2x2−3)(x2+1)(2x^2 - 3)(x^2 + 1)(2x2−3)(x2+1).
2x4−x2−32x^4 - x^2 - 32x4−x2−3
2x4−x2+32x^4 - x^2 + 32x4−x2+3
2x4+2x2−32x^4 + 2x^2 - 32x4+2x2−3
2x4−32x^4 - 32x4−3