M1=matrix([[1,2],[3,4]])
print(latex(M1))
html('$%s$' %latex(M1))
M2=matrix([[1,2,3],[1,2,3],[1,2,3]])
print(latex(M2))
html('$%s$' %latex(M2))
\left(\begin{array}{rr}
1 & 2 \\
3 & 4
\end{array}\right)
\left(1324\right) \left(\begin{array}{rrr}
1 & 2 & 3 \\
1 & 2 & 3 \\
1 & 2 & 3
\end{array}\right)
\left(111222333\right)