\frac{0}{0}\, \frac{\partial^0 L(..)}{\partial y_\nu^{\alpha ..} \partial y_{\sigma}^{\beta ..}}_{|..}\!\cdot\!(\Delta_\mu^{\prime} \Delta_\nu^{\scsc\#} A^{\alpha ..})(\Delta_\mu^{\prime} \Delta_\sigma^{\scsc\#} A^{\beta