3ac*5ab;10x*9y*(-7a);b-6a-10b+9a+4b;8m+2-(5+7m)-4m при...

Question

3ac*5ab;10x*9y*(-7a);b-6a-10b+9a+4b;8m+2-(5+7m)-4m при m=17;7(y+2x)-2(x-2y);2c-(3c+(2c-(c+1))+3)

Answer 1

3ac×5ab=15a²cb
10x×9y×(-7a)=-630xya
b-6a-10b+9a+4b=15b+15a.
А теперь подставляй и решай:)