title: Latex Equation and bmatrix
body: <p>I'm trying to use official equation, and it's giving me some trouble. I have this equation of a simple matrix operation, and LaTeX isn't liking it. What's wrong with this statement?  </p>
  
  <pre><code>\begin{equation}
  $M=\begin{bmatrix}
  V_{1,1} &amp; . &amp; . &amp; V_{1,n}\\ 
  . &amp; . &amp;  &amp; \\   
  . &amp;  &amp;.  &amp; \\ 
   V_{m,1}&amp;  &amp;  &amp; V_{m,n}
  \end{bmatrix}$
  \end{equation}
  </code></pre>
  
  <p>The error is:
  ! Display math should end with $$.
   
                     M
  l.186 $M
          =\begin{bmatrix}
  ? )</p>