atan(log(5*x))
1 ----------------- / 2 \ x*\1 + log (5*x)/
/ 2*log(5*x) \ -|1 + -------------| | 2 | \ 1 + log (5*x)/ --------------------- 2 / 2 \ x *\1 + log (5*x)/
/ 2 \ | 1 3*log(5*x) 4*log (5*x) | 2*|1 - ------------- + ------------- + ----------------| | 2 2 2| | 1 + log (5*x) 1 + log (5*x) / 2 \ | \ \1 + log (5*x)/ / -------------------------------------------------------- 3 / 2 \ x *\1 + log (5*x)/