w1⁢(z)=Γ⁡(c)⁢Γ⁡(c-a-b)Γ⁡(c-a)⁢Γ⁡(c-b)⁢w3⁢(z)+Γ⁡(c)⁢Γ⁡(a+b-c)Γ⁡(a)⁢Γ⁡(b)⁢w4⁢(z),