Hi there!
I’m trying to install TexMaths in my Linux, in Libre Writer, so I did the following:
sudo apt-get install texlive
sudo apt-get install exlive-xetex
All is good until I go to the Extension manager which won’t find any file relevant to TexMAths…
Download it from the project page first: the download link there will point you to the project’s SourceForge repository.