Алгебра, 7 класс, срочно надо(((
Сократить алгебраические дроби:
а) 7х^4у
------------
49ху^3
б) 8а^2b^3(a+b)
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20ab^2(a+b)
в) ma^2-m^2a
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m^2-ma
г) 4-d^2
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3d+6
д) m^2+2mn+n^2
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(m+n)^2
е) х^2+x
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x^3+1
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