№1
2,2abc^2 * ab * (-0,5)b^3c = -1,1a^2b^5c^3
№2
3x^2 - 2,5x^2 = 0,5x^2
1/3ab^2 + 2/5ab^2 = ab^2(1/3 + 2/5) = 11ab^2
№3
2xy^2 + 3xy - 4xy^3 + 2xy^2 - 3xy + 3xy^3 = 4xy^2 - xy^3
№4
6a^2b * (-4ab^5c) = -24a^3b^6c
№5
(2a^2b)^3 * a^2b^2 * c^2
___________________ + a^7b^4 = 8a^8b^5 / 4abc^2 = 2a^7b^4 / c
4abc^2