Involving coth-1((z2-1)1/2+c z)
Involving coth-1((z2-1)1/2+z) and tan-1(i z)
Involving coth-1((z2-1)1/2+z) and tan-1(i/z)
Involving coth-1((z2-1)1/2-z) and tan-1(i z)
Involving coth-1((z2-1)1/2-z) and tan-1(i/z)
