Involving cosh^-1((a-z)^1/2/(-2 z)^1/2)

Involving cosh^-1((-z-1)^1/2/(-2 z)^1/2) and sech^-1(z)

Involving cosh^-1((1-z)^1/2/(-2 z)^1/2) and sech^-1(z)