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*<math>tanhc(z)=2\,{\frac {{{\rm KummerM}\left(1,\,2,\,2\,z\right)}}{ \left( 2\,iz+\pi
\right) {{\rm KummerM}\left(1,\,2,\,i\pi -2\,z\right)}{{\rm e}^{2\,z-1/2\,i\pi }}}}</math>
*<math>tanhc(z)=2\,{\frac {{\it HeunB} \left( 2,0,0,0,\sqrt {2}\sqrt {z} \right) }{
\left( 2\,iz+\pi \right) {\it HeunB} \left( 2,0,0,0,\sqrt {2}\sqrt {
1/2\,i\pi -z} \right) {{\rm e}^{2\,z-1/2\,i\pi }}}}</math>
==Gallery==
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