化简(x²+2)²-2(x+2)(x-2)(x²+4)+(x2²-2)²

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化简(x²+2)²-2(x+2)(x-2)(x²+4)+(x2²-2)²
化简(x²+2)²-2(x+2)(x-2)(x²+4)+(x2²-2)²

化简(x²+2)²-2(x+2)(x-2)(x²+4)+(x2²-2)²
(x^2+2)^2-2(x+2)(x-2)(x^2+4)+(x^2-2)^2
=(x^2+2)^2+(x^2-2)^2 -2(x+2)(x-2)(x^2+4)
=x^4+4x^2+4+x^4-4x^2+4-2(x^2-4)(x^2+4)
=2x^4+8-2(x^4-16)
=2x^4+8-2x^4+32
=40