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

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

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

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