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

Involving cosh^-1(1+z/1-z) and tan^-1((-z)^1/2)

Involving cosh^-1(1+z/1-z) and tan^-1(1/(-z)^1/2)

Involving cosh^-1(1+z/1-z) and tan^-1((-1/z)^1/2)