Involving sech^-1(2^1/2(1+z²)^1/4/((1+z²)^1/2-1)^1/2)

Involving sech^-1(2^1/2(1+z²)^1/4/((1+z²)^1/2-1)^1/2) and tan^-1(z)

Involving sech^-1(2^1/2(1+z²)^1/4/((1+z²)^1/2-1)^1/2) and tan^-1(1/z)