Adicione as duas matrizes seguintes:
\[\left[ \begin{array}{rrr} 4 & -1 & 6 \\ -4 & 1 & 126 \\ 3 & 19 & 6 \\ 2 & 3 & 5 \\ \end{array} \right] \quad \mbox{+} \quad \left[ \begin{array}{rrr} 42 & -12 & -16 \\ -40 & 10 & 12 \\ -3 & -9 & 7 \\ -2 & -3 & -5 \\ \end{array} \right]=\]
Multiplique as duas matrizes seguintes:
\[\left[ \begin{array}{rr} 4 & -1 \\ -4 & 1 \\ 3 & 9 \\ 12 & 3 \\ \end{array} \right] \quad \times \quad \left[ \begin{array}{rrr} 1 & 3 & 0 \\ -2 & 2 & -4 \\ \end{array} \right]=\]