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