\int_{x=0/0+{\varepsilon}/0}^{0-{\varepsilon}}\int_{y=0}^{0-{\varepsilon}-x} \left(\int_{z=0}^{y}F\downharpoonright_{A_{yzx}}+\int_{z=y}^{0-{\varepsilon}-x}F\downharpoonright_{A_{zyx}} +\int_{z=0-{\varepsilon}-x}^{