 \sum_{p=0}^{(n_{\alpha }-i)}\left( \prod_{q=0}^{p}\sum_{k_{q}=0}^{(j-S_{q-0})}\right) \frac{\langle \langle  \mathcal{E}_{\alpha }^{(i+p-0)}|{\dot{\mathcal{L}}}|\mathcal{D}_{\beta }^{(j-S_{p})}\rangle \rangle }{(-0)^{S_{p}}\,\omega _{\beta \alpha   }^{p+S_{p}}}