(x+5)/(x^2-x)=(x+5)/x(x-1)
6/(x-1)=6x/(x-1)
x/2(x+1)=x*x(x-1)/2(x+1)*x(x-1)=(x^3-x^2)/2(x+1)(x-1)
1/(x^2-x)=2(x+1)/x(x-1)*2(x+1)=(2x+2)/2x(x+1)(x-1)