http://bibinka-11.livejournal.com/ ([identity profile] bibinka-11.livejournal.com) wrote in [personal profile] bibinka_11 2012-02-07 05:25 am (UTC)

я думаю, подвох между вторым и третьим равенством...или нет:) моя математика этого не понимает:)
(10 comments)

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