In Math(Input=Result) put (1, 2, 3)+(4, 5, 6) to get
$$\begin{pmatrix}
{\mathtt{1}}
\\
{\mathtt{2}}
\\
{\mathtt{3}}
\end{pmatrix}
{\mathtt{\,\small\textbf+\,}}\begin{pmatrix}
{\mathtt{4}}
\\
{\mathtt{5}}
\\
{\mathtt{6}}
\end{pmatrix}
= \begin{pmatrix}
{\mathtt{5}}
\\
{\mathtt{7}}
\\
{\mathtt{9}}
\end{pmatrix}$$
(1, 2, 3)*(4, 5, 6) gives (though it seems to appear in white (so difficult to see) in the Math box!
$$\begin{pmatrix}
{\mathtt{1}}
\\
{\mathtt{2}}
\\
{\mathtt{3}}
\end{pmatrix}
{\mathtt{\,\times\,}}\begin{pmatrix}
{\mathtt{4}}
\\
{\mathtt{5}}
\\
{\mathtt{6}}
\end{pmatrix}
= {\mathtt{32}}$$
Odd! It goes white here after I type Publish (but was visible to me before that)! Still some bugs in the system!
Now it's visible again!!!!
Haven't figure out how to enter matrices yet - will experiment!