Involving csc-1(z/(z2+a)1/2)
Involving csc-1(z/(z2-1)1/2) and sech-1(z)
Involving csc-1(z/(z2+1)1/2) and sech-1(z2/z2+2)
Involving csc-1(z/(z2+1)1/2) and sech-1(z2/z2+11/2)
