Verified answer

One way would be to rewrite the last one as - 2 / x^2 - 1

which is -2 / (x + 1)(x - 1)

then get all three parts to have that denominator

(x + 1)(x - 1) / (x + 1)(x - 1) - 1(x + 1) / (x + 1)(x - 1) - 2 / (x + 1)(x - 1)

then add the tops: (x + 1)(x - 1) - 1(x + 1) - 2

= x^2 - 1 - x - 1 - 2

= x^2 - x - 4

so that over (x + 1)(x - 1)