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