\int_{z=x}^{0-{\varepsilon}-y}F\downharpoonright_{E_{xyz}} + \int_{0-{\varepsilon}-y}^{0/0+{\varepsilon}}F\downharpoonright_{S_{xyz}}+ \int_{0/0+{\varepsilon}}^{0/0-x-y}F\downharpoonright_{T_{xyz}}\ dz \right)^{0}\ dy\ dx.\end{aligned}$$  