title: Rearrange a grouping of numbers into a list of tuples
body: <p>Given:</p>
  
  <pre><code>x = '1 (2,3), 4 (5)'
  </code></pre>
  
  <p>How would I get:</p>
  
  <pre><code>y = [(1,2),(1,3),(4,5)] ?
  </code></pre>
  
  <p>Thank you.</p>