Involving sech^-1(1+z/1-z)

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

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

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