Упростите выражение : 2)(11+2 x)+(- x^2+12 x-35)=
3)(7 a^2-3 a+6)-(-8 a+2 a^3+5)=
4)(14 xy-2y^2+13x^2)-(-16y^2-5xy+4x^2)=
5)(18a^2b+9ab-2ab^2)+(4ab+2ab^2)=
6)(3/14x^2y^3-5/8x^2y)-(-3/12x^2y-4/35x^2y^3)=
нужно решить хотя бы 3. Спасибо за ранее
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