title: Regular expression remove dash from tax id
body: <p>I have a tax id of <code>12-1234567</code> and need to remove the dash/hyphen so it's all numeric 121234567
  I've read different posts and tried the examples but can't get it to work.</p>
  
  <p>I have used <code>^\d[2}\D\d[7}$</code> and have replace the <code>\D</code> with <code>\W</code>, <code>("[^0-9\\+]", "")</code>, etc. </p>
  
  <p>I know this is simple but and I'm new to RegEx but need a little help.</p>