Question: Please could you make sure! It works on debian Write a regular expression to pass to grep to determine if a Chicago area (773 or

Please could you make sure! It works on debian
Write a regular expression to pass to grep to determine if a Chicago area (773 or 312) phone number, in the form (312) 281-3303, is present in a given file (The command would be as follows: cat file* I egrep
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