\begin{aligned} W_\alpha &= -\frac{1}{4} \bar{D}^2 D_\alpha V \\ &= -\frac{1}{4} \bar{D}^2 (-\sigma^\nu_{\alpha\dot\beta} \bar\theta^{\dot\beta} A_\nu + i\theta_\alpha \overline{\theta\lambda} - i \bar\theta^2 \lambda_\alpha + \frac{1}{2} \theta_\alpha \bar{\theta}^2 D - i \sigma_{\alpha \dot\alpha}^\mu \bar\theta^{\dot\alpha} \theta^\beta \sigma_{\beta\dot\beta}^\nu \bar\theta^{\dot\beta} \partial_\mu A_\nu - \sigma_{\alpha \dot \alpha}^\mu \bar\theta^{\dot\alpha} \theta^\beta \theta_\beta \bar\theta^{\dot\beta} \partial_\mu \bar\lambda_{\dot\beta}) \\ &= (a+b-c) (d-e +f)\\ \end{aligned}