title: Regex : Find a number between parentheses
body: <p>I need a regex who find the number in bold below :</p>
  
  <p>20 (L.B.D.D. hello <strong>312312</strong>) Potato 1651 (98)</p>
  
  <p>20 (L.B.D.D. hello <strong>312312</strong> bunny ) Potato 1651 (98)</p>
  
  <p>20 (<strong>312312</strong>) Potato 1651 (98)</p>
  
  <p>((\d+)) find the number 98</p>
  
  <p>I do not know what to do when there are other characters in the parenthesis</p>