_:nb631e231bb4e496bbe44c6d63b840849xb1
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ask.libreoffice.org/t/when-i-use-texmath-to-add-a-formula-it-puts-the-same-wrong-one-no-matter-what-i-have-typed-in/53453>