1 -------- 3 cosh (x)
-3*sinh(x) ---------------- 3 cosh(x)*cosh (x)
/ 2 \ | 4*sinh (x)| 3*|-1 + ----------| | 2 | \ cosh (x) / ------------------- 3 cosh (x)
/ 2 \ | 20*sinh (x)| 3*|11 - -----------|*sinh(x) | 2 | \ cosh (x) / ---------------------------- 4 cosh (x)