Install libreoffice-dmaths by entering the following commands in the terminal:
sudo apt update sudo apt install libreoffice-dmaths
Description:
Formula editing plug-in for LibreOffice Writer
This package integrates with LibreOffice to simplify the editing of mathematical and scientific formulas. It also allows you to use your favorite drawing software and include graphs of functions into a document.
Homepage: http://www.dmaths.org
Version: 4.4.0.0+dfsg1-1
Section: universe/doc