Involving sech^{-1}((2(1+z^{2})^{1/2}/((1+z^{2})^{1/2}-1))^{1/2})
Involving sech^{-1}((2(1+z^{2})^{1/2}/((1+z^{2})^{1/2}-1))^{1/2}) and tan^{-1}(z)
Involving sech^{-1}((2(1+z^{2})^{1/2}/((1+z^{2})^{1/2}-1))^{1/2}) and tan^{-1}(1/z)