title: use find/replace with formula
body: <p>This most likely a very simple question, but here goes.</p>
  
  <p>I need to search a file for numbers in a certain sequence, then add 5 to each number/
  Ex:</p>
  
  <p>time hr:1,st:2,ps:10  (is what i would be looking for - there will be all kinds of other numbers throughout the file)</p>
  
  <p>I would like it to replace the numbers with the +5 </p>
  
  <p>time hr:6,st:7,ps:15</p>