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

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

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

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