2 (x - 5) ------------- 2 x + 2*x - 35
(-5.0 + x)^2/(-35.0 + x^2 + 2.0*x)
2 (-5 + x) --------------- -35 + x*(2 + x)
-5 + x ------ 7 + x
12 1 - ----- 7 + x