w2⁢(z)=ⅇ(1-b)⁢π⁢ⅈ⁢Γ⁡(2-c)⁢Γ⁡(c-a)Γ⁡(b-c+1)⁢Γ⁡(c-a-b+1)⁢w4⁢(z)+ⅇ-b⁢π⁢ⅈ⁢Γ⁡(2-c)⁢Γ⁡(c-a)Γ⁡(b-a+1)⁢Γ⁡(1-b)⁢w6⁢(z).