title: REGEX: Select everything NOT equal to a certain string
body: <p>This should be straightforward. I need a regular expression that selects everything that does not specifically contain a certain word.</p>
  
  <p>So if I have this sentence: "There is a word in the middle of this sentence."
  And the regular expression gets everything but "middle", I should select everything in that sentence but "middle".</p>
  
  <p>Is there any easy way to do this?</p>
  
  <p>Thanks.</p>