1) (х^2 + ху)/x^2 = x(x+y)/x^2 = (x+y)/x
2) (xy+y)/(y^2+y)=y(x+1)/y(y+1)=(x+1)/(y+1)
3) (a+2)/(a^2+2a)=(a+2)/a(a+2)=1)/(a+2)
4) (4m^2-9)/(2m+3)=(2m+3)(2m-3)/(2m+3) = (2m-3
5) (5x-10)/(x-2)^2= 5(x-2)/(x-2)^2 = 5/(x-2)
6) (n-3)^2/(6-2n)=(n-3)^2/2(3-n)=(3-n)^2/2(3-n)=(3-n)/2