title: call EvalMath to parse math expression
body: <p>I'm new in php. I want to evaluate math expression using <a href="http://www.phpclasses.org/package/2695-PHP-Safely-evaluate-mathematical-expressions.html" rel="nofollow">EvalMath</a> class. I create new EvalMath using this code</p>
  
  <pre><code>require_once "evalmath.class.php";
  
  $m = new EvalMath;
  
  $result = $m-&gt;evaluate("2+2");
  
  echo ($result);
  </code></pre>
  
  <p>instead of I get the result, I get the class content in my browser.</p>
  
  <p>Did I miss something in my code?</p>