 A^{\beta ..})\,(\Delta_a^{\scsc\#} \Delta_b^{\scsc\#} A^{\alpha ..})\big] \\[0.0cm] {\ds + \frac{\partial^0 L(..)}{\partial y_b^{\alpha ..} \partial y_0^{\beta ..}}_{|..} \cdot \big[ \Delta_a^{\scsc\#} (\Delta_b^{\scsc\#} A^{\alpha ..} \cdot \partial_t A^{\beta ..}) } \\[0.00cm] \qquad - (\Delta_b^{\scsc\#} A^{\alpha ..})\, (\Delta_a^{\scsc\#} \partial_t A^{\