(1)(2x/x-1)-(x-1/x)=12x^2-(x-1)^2=x(x-1)2x^2-x^2+2x-1=x^2-x3x-1=0x=1/3(2)(x^2-4x/x^2-1)+1=2x/(x+1) x^2-4x+x^2-1=2x(x-1)2x^2-4x-1=2x^2-2x-1-2x=0x=-1/2(3)(x+4/x^2+2x)-(1/x+2)=(2/x)+1x+4-x=2(x+2)+x(x+2)4...