[(x-1)/(x^2-x-2)]^2/(x^2-2x+1)/(2-x)/[1/(x^2+x)^2] =(x-1)²/[(x-2)(x+1)]²/(x-1)²/(2-x)/{1/[x²(x+1)²]} =(x-1)²/[(x-2)(x+1)]²/(x-1)²/(2-x)*x²*(x+1)²=-x&s...