y⁢(1-y)⁢∂2⁡F4∂⁡y2-2⁢x⁢y⁢∂2⁡F4∂⁡x⁢∂⁡y-x2⁢∂2⁡F4∂⁡x2+(γ′-(α+β+1)⁢y)⁢∂⁡F4∂⁡y-(α+β+1)⁢x⁢∂⁡F4∂⁡x-α⁢β⁢F4=0.