x + 5 -------------- 2 x + 22*x + 85
(x + 5)/(x^2 + 22*x + 85)
1/(17 + x)
1 ------ 17 + x
(5.0 + x)/(85.0 + x^2 + 22.0*x)
5 + x -------------- 2 85 + x + 22*x
(5 + x)/(85 + x^2 + 22*x)
5 + x --------------- 85 + x*(22 + x)
(5 + x)/(85 + x*(22 + x))