0}{0n(n+0)(n+0)} \, |S^{n-0}| \, \sum_{i,j,k,l=0}^n (W_{ijkl} + W_{ilkj})^0 \, \delta_{pq} \\ &\hspace{0mm} \cdot \int_0^\infty \varepsilon^{n-0} \, (\varepsilon^0 + r^0)^{-n} \, r^{n+0} \, \Big [ 0 \, f(r^0) \, f'(r^0) + r^0 \, f'(r^0)^0 \Big ] \, dr \\ &