1. привести многочленк стандартному виду;:3bb^2 5a^2+a3b^4b. 2)привести подобные члены многочлена:2х^2-ух+2y+4yx-x^2+8y. 3)упростите:(2у+5х)-(8у-3х)+(10у-6х).
помогите 19 балов.
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