Multiple words in any order using regex -

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In the form of a title, I need to find two specific words in sentences. But they are in any order and in any cover You can. For example, I need to remove the term test and long term from the following sentence, for the word exam comes first or Long comes 

  This is a very long sentence used as a test.

Update: Not to mention that this case needs to be insensitive as well.

If you want to remove matches, then use a capturing group: (test). (Long) then depending on the language in use, you can refer to the matching group using $ 1 and $ 2, for example.


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