Упростите выражения:
2(x-1)+3(2-x)
7m(m-n)-3n(n+m)
2ab(3-2a)+4b(3a-7a^2)
(x-2y)*2xy-28x^2y
2(x-1)+3(2-x)
7m(m-n)-3n(n+m)
2ab(3-2a)+4b(3a-7a^2)
(x-2y)*2xy-28x^2y
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Answers & Comments
7m2-7mn-3n2-3mn=-10mn+7m2-3n2
6ab-