2 x - 14*x + 49 -------------- 2 49 - x
(49.0 + x^2 - 14.0*x)/(49.0 - x^2)
49 + x*(-14 + x) ---------------- 2 49 - x
7 - x ----- 7 + x
-(-7 + x) ---------- 7 + x
14 -1 + ----- 7 + x