title: + Regular Expression not working in sed
body: <p>Team,</p>
  
  <p>I have a file with data as mention below.</p>
  
  <pre><code>[root@ip-12-32-8-15 ~]# cat dbbackup
  
  (555)555-1212
  
  (555)555-1213
  </code></pre>
  
  <h1>Expected Output:</h1>
  
  <pre><code>First: (555) Second: 555- Third: 1212
  
  First: (555) Second: 555- Third: 1213
  </code></pre>
  
  <p>I am using sed its not working .</p>
  
  <pre><code>sed -n -e 's/\([0-9]+)\)\([0-9]+-\)\([0-9]+\)/First: \1 Second: \2 Third: \3/p' dbbackup
  </code></pre>
  
  <p>Please Let me know how to achieve the above mention output. </p>