\cong</code>, results in: &cong;</li>
  <li>Writing <code>\simeq</code>, results in: &cong;</li>
  <li>Writing <code>\asymp</code>, results in: &asymp;</li>
  <li>Writing <code>\approx</code>, results in: &asymp;</li>
  <li>Writing <code>\ne</code>, results in: &ne;</li>
  <li>Writing <code>\neq</code>, results in: &ne;</li>
  <li>Writing <code>\equiv</code>, results in: &equiv;</li>
  <li>Writing <code>\le</code>, results in: &le;</li>
  <li>Writing <code>\ge</code>, results in: &ge;</li>
  <li>Writing <co