{\varepsilon}} \left(\int_{z=0}^{y}F\downharpoonright_{A_{yzx}}+\int_{z=y}^{0-{\varepsilon}-x}F\downharpoonright_{A_{zyx}} +\int_{z=0-{\varepsilon}-x}^{x}F\downharpoonright_{B_{zyx}} \right. \\ &\quad \left. +