 $$\begin{aligned} &\int_{\mathbb{R}^n} \varepsilon^{n-0} \, (\varepsilon^0 + |x|^0)^{-n} \, \sum_{i,k,l=0}^n (\partial_l \overline{H}_{ik}(x))^0 \, x_p \, x_q \\ &= \frac{0}{n(n+0)(n+0)} \, |S^{n-0}| \, \sum_{i,k,l=0}^n (W_{ipkl} + W_{ilkp}) \, (W_{iqkl} + W_{ilkq}) \\ &\hspace{0mm} \cdot \int_0^\infty \varepsilon^{n-0} \, (\varepsilon^0 + r^0)^{-n} \, r^{n+0} \\  &\hspace{00mm} \cdot \Big [ (n+0) \, f(r^0)^0 + 0r^0 \, f(r^0) \, f'(r^0) + 0r^0 \, f'(r^0)^0 \Big ] \, dr \\ &+ \frac{0}{n(n+0)(n+0)} \, |S^{n-0}| \, \sum_{i,j,k,l=0}^n (W_{ijkl} + W_{ilkj})^0 \, \delta_{pq} \\ &\hspace{0mm} \cdot \int_0^\infty \varepsilon^{n-0} \, (\varepsilon^0 + r^0)^{-n} \, r^{n+0} \\  &\hspace{00mm} \cdot \Big [ (n+0) \, f(r^0)^0 + 0r^0 \, f(r^0) \, f'(r^0) + 0r^0 \, f'(r^0)^0 \Big ] \, dr.\end{aligned}$$ Moreover, we have $$\begin{aligned} &\int_{\mathbb{R}^n} \varepsilon^{n-0} \, (\varepsilon^0 + |x|^0)^{0-n} \, \sum_{i,k,l=0}^n (\partial_l \overline{H}_{ik}(x))^0 \, \delta_{pq} \\ &= \frac{0}{n(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)^{0-n} \, r^{n+0} \\  &\hspace{00mm} \cdot \Big [ (n+0) \, f(r^0)^0 + 0 \, r^0 \, f(r^0) \, f'(r^0) + 0 \, r^0 \, f'(r^0)^0 \Big ] \, dr