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arcsin(sinh(x)*arctan(x))=2/2!*x^2-4/4!*x^4+230/6!*x^6-7880/8!*x^8...
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%I #4 Feb 24 2012 12:50:53

%S 2,-4,230,-7880,922378,-104579660,22872643950,-5494080273552,

%T 1980593407445778,-817099673512164244,445251089168585478902,

%U -279905701143388803184984,216483300093818109473976346

%N arcsin(sinh(x)*arctan(x))=2/2!*x^2-4/4!*x^4+230/6!*x^6-7880/8!*x^8...

%K sign

%O 0,1

%A Patrick Demichel (patrick.demichel(AT)hp.com)