\usepackage{unicode-math} \setmainfont{Garamond Libre} \setmathfont{Garamond-Math.otf} %make integral sign upright \setmathfont{NewCMMath-Regular.otf}[ range={"222B-"2233, "2A0C-"2A1C}, StylisticSet=2 ]
lualatex index.tex
make4ht -ulm default -a debug index.tex "mathjax,htm"