Regex Help

To all the regex experts,
I am looking for help with two regex expressions:
1) A regex to remove anything enclosed in square [], or rounded () brackets, including the brackets themselves.
Eg. [test], (test),[123abc],(123abc) - everything would be removed
      test) - would be return test) as it is not enclosed in brackets.
2) A regex to find a remove a 4 digit year in a string, but ONLY if the whole string is not a 4 digit year.
 Eg.  Budget 2009 - would return Budget
        1997 - would return 1997 because the string is just a year.
Cheers!!!
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