b + 5 b - 5 ----- + ----- b - 5 b + 5
(-5.0 + b)/(5.0 + b) + (5.0 + b)/(-5.0 + b)
2 2 (-5 + b) + (5 + b) -------------------- (-5 + b)*(5 + b)
/ 2\ 2*\25 + b / ----------- 2 -25 + b
/ 2\ 2*\25 + b / ---------------- (-5 + b)*(5 + b)
100 2 + -------- 2 -25 + b