x - 1/x - 1/x + 1 = 2x - 1/x^2 = x, x-1/x + 1/x + 1 = 2x + 1/x^2 + x, x-1/x-1/x+1 = 2x-1/x^2+x, x-1/x-1/x+1=2x-1/x^2+x, x - 1/x + 1/x + 1 - 2x + 1/ x^2 + x, x-1/x-1/x+1 = 2x-1/ x^2+x