(-2x-1)^2乘以(2x-1)^2-16(x+3)^2乘以(x-3)^2=(2x+1)^2乘以(2x-1)^2-16(x+3)^2乘以(x-3)^2=[(2x+1)(2x-1)]^2-16[(x+3)(x-3)]^2=(4x^2-1)^2-16(x^2-9)^2=(4x^2-1)^2-[4(x^2-9)]^2={(4x^2-1)+[4(x^2-9)]}{(4x^2-1)-[4(...