y⁢(1-y)⁢∂2⁡F3∂⁡y2+x⁢∂2⁡F3∂⁡x⁢∂⁡y+(γ-(α′+β′+1)⁢y)⁢∂⁡F3∂⁡y-α′⁢β′⁢F3=0,