w5⁢(z)=ⅇa⁢π⁢ⅈ⁢z-a⁢F⁡(a,a-c+1a-b+1;1z)=ⅇ(c-b)⁢π⁢ⅈ⁢zb-c⁢(1-z)c-a-b⁢F⁡(1-b,c-ba-b+1;1z)=(1-z)-a⁢F⁡(a,c-ba-b+1;11-z)=ⅇ(c-1)⁢π⁢ⅈ⁢z1-c⁢(1-z)c-a-1⁢F⁡(1-b,a-c+1a-b+1;11-z).