Помогите плиз,срочно нужно

x²+1/x-2 - x²-1/x+1 = 8
(x²+1)(x+1)/(x-2)(x+1) - (x²-1)(x-2)/(x-2)(x+1) = 8
(x²+1)(x+1)(x²-1)(x-2)/(x-2)(x+1) = 8
(x²+1)(x+1)(x²-1)(x-2)=8(x-2)(x+1)
(x-1)(x+1)(x-2)=(8x-16)*(8x+8)
(x-1)(x+1)(x-2)=(64x²-192x-128)