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