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<math>
\begin{matrix}
\phantom{n} & \phantom{nn} {\color{Red}1} \phantom{nnnn} {\color{Red}2} \phantom{nn} \dots \phantom{nn} {\color{Red}n \phantom{nnnn}}\\
\begin{array}{c}
{\color{Green}1}\\
{\color{Green}2}\\
{\color{Green}3}\\
\vdots\\
{\color{Green}m}
\end{array} & 
\begin{bmatrix}
a_{{\color{Green}1}{\color{Red}1}} & a_{{\color{Green}1}{\color{Red}2}} & \dots & a_{{\color{Green}1}{\color{Red}n}}\\
a_{{\color{Green}2}{\color{Red}1}} & a_{{\color{Green}2}{\color{Red}2}} & \dots & a_{{\color{Green}2}{\color{Red}n}}\\
a_{{\color{Green}3}{\color{Red}1}} & a_{{\color{Green}3}{\color{Red}2}} & \dots & a_{{\color{Green}3}{\color{Red}n}}\\
\vdots & \vdots & \vdots & \vdots & \\
a_{{\color{Green}m}{\color{Red}1}} & a_{{\color{Green}m}{\color{Red}2}} & \dots & a_{{\color{Green}m}{\color{Red}n}}
\end{bmatrix}
\end{matrix}
</math>
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