有几题数学提目!要有步骤(x-3)(x+2)-(x+1)^2(3x+1)^2(3x-1)^2

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有几题数学提目!要有步骤(x-3)(x+2)-(x+1)^2(3x+1)^2(3x-1)^2
有几题数学提目!要有步骤
(x-3)(x+2)-(x+1)^2
(3x+1)^2(3x-1)^2

有几题数学提目!要有步骤(x-3)(x+2)-(x+1)^2(3x+1)^2(3x-1)^2
(x-3)(x+2)-(x+1)^2=x^2-x-6-(x^2+2x+1)=x^2-x-6-x^2-2x-1=-3x-7
(3x+1)^2(3x-1)^2=[(3x+1)(3x-1)]^2=[9x^2-1]^2=81x^4-18x^2+1

-3x-7
81x^4-18x^2+1