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Add & subtract matrices

[24−10−21]−[224−22−2]={\left[ \begin{array}{cc} 2 & 4 & -1\\ 0 & -2 & 1 \end{array} \right]-\left[ \begin{array}{cc} 2 & 2 & 4 \\ -2 & 2 &-2 \end{array} \right]= }