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