exp Pow 1.38629436111989 Pow asec coth pi x0 
Mul exp Pow 1.38629436111989 Pow asec coth pi x0 Mul Pow 1.38629436111989 Add Pow asec coth pi x0 -1 Mul 1.71292862109817 Mul Pow asec coth pi Add x0 -1 Mul asec coth pi log asec coth pi 