\overrightarrow{\mathbf{A}}=\mathbf{2} \hat{\mathbf{i}}-\hat{\mathbf{j}}, \overrightarrow{\mathbf{B}}=\hat{\mathbf{i}}+\hat{\mathbf{j}}+\hat{\mathbf{k}} এবং \vec{C} =-2 \hat{i}+\hat{k} হলে (\overrightarrow{\mathbf{A}} \times \overrightarrow{\mathbf{B}}) \times \overrightarrow{\mathbf{C}} = ?