F⁡(a,b12;z)=2a+b-(3/2)π⁢Γ⁡(a+12)⁢Γ⁡(b+12)⁢(z-1)(-a-b+(1/2))/2⁢(ⅇ±π⁢ⅈ⁢(a+b-(1/2))⁢Pa-b-(1/2)-a-b+(1/2)⁡(-z)+Pa-b-(1/2)-a-b+(1/2)⁡(z)),