(x2+1)(x–2)( x ^2 + 1 ) (x – 2 ) (x2+1)(x–2)
(x2+1)(x+2)(x^2 + 1) (x + 2)(x2+1)(x+2)
(x2−1)(x+2)(x^2 - 1) (x + 2)(x2−1)(x+2)
(x2−1)(x−2)(x^2 - 1) (x - 2)(x2−1)(x−2)