What does a Regular Expression (regex) represent? A mathematical expression A set of strings O An int O Adecoder key What is NOT a typical use for Regular Expressions? Handling blank lines and white space issues O Validating a user's input, like an email entry Listing all strings a regex represents O Quickly finding similar text in a file Which of the following DOES NOT match this regex: ["a-eA-E](4) O ZZZA Odb Oyups O 1010 Choose ALL that apply. Select all valid regexes that accept the following: 7447 O 174] O 1714121715 0 74 47447