y⁢(1-y)⁢∂2⁡F1∂⁡y2+x⁢(1-y)⁢∂2⁡F1∂⁡x⁢∂⁡y+(γ-(α+β′+1)⁢y)⁢∂⁡F1∂⁡y-β′⁢x⁢∂⁡F1∂⁡x-α⁢β′⁢F1=0,