w2⁢(z)=ⅇ(1-a)⁢π⁢ⅈ⁢Γ⁡(2-c)⁢Γ⁡(c-b)Γ⁡(a-c+1)⁢Γ⁡(c-a-b+1)⁢w4⁢(z)+ⅇ-a⁢π⁢ⅈ⁢Γ⁡(2-c)⁢Γ⁡(c-b)Γ⁡(a-b+1)⁢Γ⁡(1-a)⁢w5⁢(z),