x2-x-x2

x2 x x2 x2 x x2 is equal to x2+x=x2-1 x2+x+1/(x2+1)(x+2) (x2-x)y2+y-(x2+x) (x2+x-2)(x2-x+2) x2-x+1/x2+x+1 range f(x)=x2/x2+1 x2/x2-25-x/(x-5) x(x2-4)(x2+4)=0