Write 12 examples of regex strings using proper syntax. Display in table format. In the first column, write the string. In the second column, write what it does. In the third column, write where you would use it, and where it should be included in your file. In the fourth column, break it down and explain each part in detail. 

...//
user
Sure, here are 12 examples of regex strings in a table format:

Regex String	Function	Usage	Breakdown and Explanation
[a-zA-Z]+	Matches any word consisting of only letters, regardless of case.	Used to validate input fields where only letters are allowed, such as names or usernames.	[a-zA-Z] matches any single letter (case-insensitive), and + matches one or more of the preceding expression, resulting in any combination of letters.
\d{3}-\d{2}-\d{4}	Matches a social security number in the format of XXX-XX-XXXX.	Used for validating social security number inputs.	\d matches any digit, and {3}, {2}, and {4} specify the exact number of digits to match in each group. The hyphens are also included as literal characters to match.
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[a-zA-Z\d]{8,}$	Matches a password that contains at least one lowercase letter, one uppercase letter, and one digit, and is at least 8 characters long.	Used for validating password inputs to ensure they meet complexity requirements.	^ matches the start of the string, (?=.*[a-z]) uses a positive lookahead to ensure at least one lowercase letter is included, (?=.*[A-Z]) ensures at least one uppercase letter is included, (?=.*\d) ensures at least one digit is included, [a-zA-Z\d]{8,} matches any combination of letters and digits that is at least 8 characters long, and $ matches the end of the string.
^\d{4}$	Matches a 4-digit PIN.	Used for validating PIN inputs.	^ matches the start of the string, \d matches any digit, {4} specifies that exactly 4 digits must be matched, and $ matches the end of the string.
^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$	Matches an email address.	Used for validating email inputs.	^ matches the start of the string, [\w-\.]+ matches any combination of word characters, hyphens, and periods (to allow for email addresses with subdomains), @ matches the literal '@' symbol, ([\w-]+\.)+ matches one or more instances of a group consisting of word characters and a period (to allow for email addresses with multiple subdomains), [\w-]{2,4} matches the top-level domain (e.g. com, org, net), which can be between 2 and 4 characters long, and $ matches the end of the string.
^http[s]?://[a-z]+\.[a-z]{2,}$	Matches a URL starting with "http://" or "https://" and ending with a domain name.	Used for validating URL inputs.	^ matches the start of the string, http[s]?:// matches either "http://" or "https://", [a-z]+\. matches one or more letters followed by a period (to match the domain name), [a-z]{2,} matches the top-level domain (e.g. com, org, net), which can be between 2 and any number of characters long, and $ matches the end of the string.
`^
?
\d
3
?\d3?[-.\s]?\d{3}[-.\s]?\
assistant