Involving csch-1((2(1+z2)1/2/(1-(1+z2)1/2))1/2)
Involving csch-1((2(1+z2)1/2/(1-(1+z2)1/2))1/2) and cot-1(z)
Involving csch-1((2(1+z2)1/2/(1-(1+z2)1/2))1/2) and cot-1(1/z)
