If $\mathbf{v} \times \mathbf{w} = \begin{pmatrix} 2 \\ 7 \\ -13 \end{pmatrix},$ then find $\mathbf{w} \times \mathbf{v}.$
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<|im_start|>user
If $\mathbf{v} \times \mathbf{w} = \begin{pmatrix} 2 \\ 7 \\ -13 \end{pmatrix},$ then find $\mathbf{w} \times \mathbf{v}.$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\begin{pmatrix} - 2 \\ -7 \\ 13 \end{pmatrix}
If $\mathbf{v} \times \mathbf{w} = \begin{pmatrix} 2 \\ 7 \\ -13 \end{pmatrix},$ then find $\mathbf{w} \times \mathbf{v}.$
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