http://ol7gun7ka.livejournal.com/ ([identity profile] ol7gun7ka.livejournal.com) wrote in [personal profile] lukomnikov 2008-07-02 09:11 am (UTC)

Чудесно!!! :)
Буду своим ученикам для запоминания правила эту формулу давать!!!
(19 comments)

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