Вероніка007 1. (a²-b²)3ab/6a²b²(a+b)=a²-b²/2ab(a+b)=(a-b)(a+b)/2ab(a+b)=a-b/2ab
2 (x²+xy)y/x(xy+y²)=(x+y)xy/xy(x+y)=1
3 (a²b-4b³)a²b/3ab²(a²-ab) =a²-4b²/3(a-b)
5. (x²-xy)(x²+xy)y/(x²+xy)xy=x²-xy/x=x-y
6. (c+d)(2c²-2d²)/c(c-d)(c+d)=2(c-d)(c+d)/c(c-d)=2(c+d)/c