Занимательная математика | Лента Мёбиуса. Фокус из бумаги
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![Демократия математически невозможна (но есть нюансы) [Veritasium]](https://sun9-48.userapi.com/7fyJmSLPzQZF3VVQ86uMlCKXlC9D8lWohyITPg/72f5BozydCE.jpg)
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