\documentclass{article}

%% Created with wxMaxima 11.08.0

\setlength{\parskip}{\medskipamount}
\setlength{\parindent}{0pt}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{color}
\usepackage{amsmath}

\definecolor{labelcolor}{RGB}{100,0,0}

\begin{document}

\noindent
%%%%%%%%%%%%%%%
%%% INPUT:
\begin{minipage}[t]{8ex}{\color{red}\bf
\begin{verbatim}
(%i7)
\end{verbatim}}
\end{minipage}
\begin{minipage}[t]{\textwidth}{\color{blue}
\begin{verbatim}
e:matrix([1,0,0],[0,1,0],[0,0,1]);
\end{verbatim}}
\end{minipage}
%%% OUTPUT:
\begin{math}\displaystyle
\parbox{8ex}{\color{labelcolor}(\%o7) }
\begin{pmatrix}1 & 0 & 0\cr 0 & 1 & 0\cr 0 & 0 & 1\end{pmatrix}
\end{math}
%%%%%%%%%%%%%%%


\noindent
%%%%%%%%%%%%%%%
%%% INPUT:
\begin{minipage}[t]{8ex}{\color{red}\bf
\begin{verbatim}
(%i8)
\end{verbatim}}
\end{minipage}
\begin{minipage}[t]{\textwidth}{\color{blue}
\begin{verbatim}
m:matrix([1,-4/9,-5/9],[-4/9,1,-4/9],[-5/9,-4/9,1]);
\end{verbatim}}
\end{minipage}
%%% OUTPUT:
\begin{math}\displaystyle
\parbox{8ex}{\color{labelcolor}(\%o8) }
\begin{pmatrix}1 & -\frac{4}{9} & -\frac{5}{9}\cr -\frac{4}{9} & 1 & -\frac{4}{9}\cr -\frac{5}{9} & -\frac{4}{9} & 1\end{pmatrix}
\end{math}
%%%%%%%%%%%%%%%


\noindent
%%%%%%%%%%%%%%%
%%% INPUT:
\begin{minipage}[t]{8ex}{\color{red}\bf
\begin{verbatim}
(%i9)
\end{verbatim}}
\end{minipage}
\begin{minipage}[t]{\textwidth}{\color{blue}
\begin{verbatim}
t:e-m;
\end{verbatim}}
\end{minipage}
%%% OUTPUT:
\begin{math}\displaystyle
\parbox{8ex}{\color{labelcolor}(\%o9) }
\begin{pmatrix}0 & \frac{4}{9} & \frac{5}{9}\cr \frac{4}{9} & 0 & \frac{4}{9}\cr \frac{5}{9} & \frac{4}{9} & 0\end{pmatrix}
\end{math}
%%%%%%%%%%%%%%%


\noindent
%%%%%%%%%%%%%%%
%%% INPUT:
\begin{minipage}[t]{8ex}{\color{red}\bf
\begin{verbatim}
(%i10)
\end{verbatim}}
\end{minipage}
\begin{minipage}[t]{\textwidth}{\color{blue}
\begin{verbatim}
x:e+t^1+t^2+t^3;
\end{verbatim}}
\end{minipage}
%%% OUTPUT:
\begin{math}\displaystyle
\parbox{8ex}{\color{labelcolor}(\%o10) }
\begin{pmatrix}1 & \frac{532}{729} & \frac{755}{729}\cr \frac{532}{729} & 1 & \frac{532}{729}\cr \frac{755}{729} & \frac{532}{729} & 1\end{pmatrix}
\end{math}
%%%%%%%%%%%%%%%


\noindent
%%%%%%%%%%%%%%%
%%% INPUT:
\begin{minipage}[t]{8ex}{\color{red}\bf
\begin{verbatim}
(%i11)
\end{verbatim}}
\end{minipage}
\begin{minipage}[t]{\textwidth}{\color{blue}
\begin{verbatim}
transpose(m);
\end{verbatim}}
\end{minipage}
%%% OUTPUT:
\begin{math}\displaystyle
\parbox{8ex}{\color{labelcolor}(\%o11) }
\begin{pmatrix}1 & -\frac{4}{9} & -\frac{5}{9}\cr -\frac{4}{9} & 1 & -\frac{4}{9}\cr -\frac{5}{9} & -\frac{4}{9} & 1\end{pmatrix}
\end{math}
%%%%%%%%%%%%%%%

\end{document}