1 ------- cosh(x)
1/cosh(x)
-sinh(x) --------- 2 cosh (x)
2 2*sinh (x) -1 + ---------- 2 cosh (x) --------------- cosh(x)
/ 2 \ | 6*sinh (x)| |5 - ----------|*sinh(x) | 2 | \ cosh (x) / ------------------------ 2 cosh (x)