viewimage.php?id=20bcc42e&no=24b0d769e1d32ca73dec82fa11d02831d5ca5516da218d33b13f2760b9195b28e8c7be9b3bb98617727ac2ef7c73e8cadf4027faaae99bfbd8e6a85b3c57f2dc02e568d3eee946fb84b654b275a686cb156a16

cos i =( e + (1/e) )/2

i^i = e^(-π/2)

0.5! = √π /2


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