title: Replace all content within braces?
body: <p>In the end I need a regex which basically converts me a phone number into a E164 conform number. As for now i got this:</p>
  
  <pre><code>result = s.replaceAll("[(*)|+| ]", "");
  </code></pre>
  
  <p>It replaces everything fine: the spaces, the "+"-sign and also the braces "()". But it does not match the content of its braces, so that e.g. the number <code>+49 (0)11 111 11 11</code> will be replaced to <code>49111111111</code>. </p>
  
  <p>How can I get this to work?</p>