\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
For \(\Vect{a}=\begin{pmatrix} 2 \\ 1 \\ -1 \end{pmatrix}\) and \(\Vect{b}=\begin{pmatrix} 1 \\ 2 \\ 3 \end{pmatrix}\), calculate:
\(\Vect{a}\times \Vect{b} = \begin{pmatrix} \input{125021}{}{3em}{2em}{}{} \\ \input{225021}{}{3em}{2em}{}{} \\ \input{325021}{}{3em}{2em}{}{} \end{pmatrix}\)