Involving csc-1(z2/z2+a1/2)
Involving csc-1(z2/z2-11/2) and sech-1(z)
Involving csc-1(z2/z2+11/2) and sech-1(z2/z2+2)
Involving csc-1(z2/z2+11/2) and sech-1(z2/z2+11/2)
