vvv2010 (
vvv2010
) wrote
2011
-
12
-
27
01:10 am
Верно ли это равенство?
для любителей математики:
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galina-efimova.livejournal.com
2011-12-26 11:06 pm (UTC)
(
link
)
Добрых снов)))
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