Involving tanh^-1((1-z²)^1/2+a/z)

Involving tanh^-1((1-z²)^1/2+1/z) and tan^-1(i z)

Involving tanh^-1((1-z²)^1/2+1/z) and tan^-1(i/z)

Involving tanh^-1((1-z²)^1/2-1/z) and tan^-1(i z)

Involving tanh^-1((1-z²)^1/2-1/z) and tan^-1(i/z)