Involving coth^-1(2 (-z)^1/2/1-z)

Involving coth^-1(2 (-z)^1/2/1-z) and tan^-1(z^1/2)

Involving coth^-1(2 (-z)^1/2/1-z) and tan^-1(1/z^1/2)

Involving coth^-1(2 (-z)^1/2/1-z) and tan^-1(1/z^1/2)