$\begin{pmatrix}1\\2\end{pmatrix}-\begin{pmatrix}2\\1\end{pmatrix}$

$\begin{pmatrix}67\\44\\-91\end{pmatrix}-\begin{pmatrix}101\\50\\3\end{pmatrix}$

$\begin{pmatrix}5\\7\end{pmatrix}-\begin{pmatrix}4\\3\end{pmatrix}-\begin{pmatrix}-1\\2\end{pmatrix}$

$\left(\begin{pmatrix}34\\85\\1\end{pmatrix}-\begin{pmatrix}3\\66\\-72\end{pmatrix}\right)-\begin{pmatrix}31\\19\\73\end{pmatrix}$

$\left(\begin{pmatrix}5\\1\end{pmatrix}-\begin{pmatrix}3\\-3\end{pmatrix}\right)-\left(\begin{pmatrix}2\\-2\end{pmatrix}-\begin{pmatrix}-2\\-1\end{pmatrix}\right)$