Involving csch-1(1/c z-11/2)
Involving csch-1(1/z-11/2) and csch-1(i/z1/2)
Involving csch-1(1/z-11/2) and csch-1((-1/z)1/2)
Involving csch-1(1/-z-11/2) and csch-1(1/z1/2)