Write as a single matrix : \[ \left[\begin{array}{lll} 1 & -2 & 3 \end{array}\right]\left[\begin...
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as a single matrix :
\[
\left[\begin{array}{lll}
1 & -2 & 3
\end{array}\right]\left[\begin{array}{rrr}
2 & -1 & 5 \\
0 & 2 & 4 \\
7 & 5 & 0
\end{array}\right]-\left[\begin{array}{lll}
2 & -5 & 7
\end{array}\right]
\]
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