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https://bravikov.wordpress.com/2015/09/12/%d0%bf%d0%b5%d1%80%d0%b5%d0%bc%d0%b5%d0%bd%d0%bd%d1%8b%d0%b5-%d0%b2-%d1%84%d0%be%d1%80%d0%bc%d1%83%d0%bb%d0%b0%d1%85-%d0%b2-libreoffice-writer/
Переменные в формулах в текстовом документе LibreOffice