February 2009
edit
Welcome to Wikipedia. The recent edit you made to the page Mathematical joke has been reverted, as it appears to be unconstructive. Use the sandbox for testing; if you believe the edit was constructive, please ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you. J.delanoygabsadds 22:04, 17 February 2009 (UTC)
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