x⁢(1-x)⁢∂2⁡F2∂⁡x2-x⁢y⁢∂2⁡F2∂⁡x⁢∂⁡y+(γ-(α+β+1)⁢x)⁢∂⁡F2∂⁡x-β⁢y⁢∂⁡F2∂⁡y-α⁢β⁢F2=0,