title: Regular expression to match balanced parentheses
body: <p>I need a regular expression to select all the text between two outer brackets.</p>
  <p>Example:<br />
  <code>START_TEXT(text here(possible text)text(possible text(more text)))END_TXT</code><br />
  <code>          ^                                                      ^  </code></p>
  <p>Result:<br />
  <code>(text here(possible text)text(possible text(more text)))</code></p>