...is not case sensitive., ...will display all the lines in a file containing the specified Regular Expression., ...will display all the lines that begin with the specified Regular Expression., ...will display the line numbers in a file that contain a specified Regular Expression.

...is not case sensitive.
...will display all the lines in a file containing the specified Regular Expression.
...will display all the lines that begin with the specified Regular Expression.
...will display the line numbers in a file that contain a specified Regular Expression.

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