（1-2x）²（2x+1)²-（3+2x）²（3-2x）²=[(1-2x)(1+2x)]²-[(3+2x)(3-2x)]²=(1-4x²)²-(9-4x²)²=(1-4x²+9-4x²)(1-4x²-9+4x²)=(10-8x²)(-8...