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Ответ

Ответ дан
oksana8299

задание 4

1)

 frac{ab { } ^{2}  + b ^{3}  - 6ab - 6b ^{2} + 9a + 9b  }{a ^{2} - 2a - 3 }

2)

 - 3x - 6x ^{2}

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