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

Involving sech^-1((2(1-z²)^1/2/((1-z²)^1/2-1))^1/2) and coth^-1(z)

Involving sech^-1((2(1-z²)^1/2/((1-z²)^1/2-1))^1/2) and coth^-1(1/z)