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

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

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

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