I am trying to solve the inequality

[(4x - x^2 - 7) / (x^2 - 1)] >_ 3

I am still at the re-arranging stage and I get up to the point of

[(4x - x^2 - 7) / (x^2 - 1)] -3 >_ 0 which I understand how to get to.

But I do not understand how to get the below line of.

[(4x - 4x^2 - 4) / (x^2 - 1)] >_ 0