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https://annamikhovich.com/2018/11/01/%d1%80%d0%b0%d0%b7%d0%bd%d0%be%d1%81%d1%82%d1%8c-%d0%b8-%d0%b5%d0%b4%d0%b8%d0%bd%d1%81%d1%82%d0%b2%d0%be-%d0%b8%d0%bb%d0%b8-%d0%ba%d0%b0%d0%ba-%d0%b2%d1%81%d1%91-%d1%81%d0%b2%d1%8f%d0%b7%d0%b0%d0%bd/
Разность и единство. Или как всё связано