title: Convert equation string to equation
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/10857726/running-an-equation-with-javascript-from-a-text-field">Running an equation with Javascript from a text field</a>  </p>
  </blockquote>
  
  
  
  <p>How can I convert the following:</p>
  
  <pre><code>var n = "2x^3+3x+6";
  </code></pre>
  
  <p>To</p>
  
  <pre><code>var x = a number
  var n = 2x^3+3x+6;
  </code></pre>
  
  <p>In JavaScript?</p>