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

Involving sin^-1(1-z/1+z) and tanh^-1((-z)^1/2)

Involving sin^-1(1-z/1+z) and tanh^-1(1/(-z)^1/2)

Involving sin^-1(1-z/1+z) and tanh^-1((-1/z)^1/2)