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Автор - stalker1051

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Ответ

Автор - irabeda

3(3-х^2)-(9-3x^2+x^4)*(x^2+3)-3(x^2-x)*(x^2+x)=9-3x^2-(9x^2+27-3x^4-9x^2+x^6+3x^4)-3(x^4-X^2)=9-3X^2-(27+X^6)-3X^4+3x^2=9-27X^6-3x^4=-18-x^6-3x^4

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