title: How to remove middle substring using regex?
body: <p>How can I turn this string <code>....cid=1234;tld=...</code> to <code>....cid=;tld=...</code></p>
  <p>I have tried this formula unsuccessfully:</p>
  <pre><code>=REGEXREPLACE( A1, &quot;(.*cid=)(.*)(;tld=.*)&quot;, &quot;$1$3&quot;));
  </code></pre>
  <p>How should I remove the middle substring?</p>