Involving coth-1(z-1/2(-z)1/2)
Involving coth-1(z-1/2(-z)1/2) and tan-1(z1/2)
Involving coth-1(z-1/2(-z)1/2) and tan-1(1/z1/2)
Involving coth-1(z-1/2(-z)1/2) and tanh-1(1/z1/2)