Let $\vec{a}=-5 \hat{\imath}+\hat{\jmath}-3 \hat{k}, \vec{b}=\hat{\imath}+2 \hat{\jmath}-4 \hat{k}$ and $\vec{c}=(((\vec{a} \times \vec{b}) \times \hat{\imath}) \times \hat{\imath}) \times \hat{\imath}$. Then $\vec{c} \cdot(-\hat{\imath}+\hat{\jmath}+\hat{k})$ is equal to