%#!lualatex
-\documentclass{ltjsarticle}
+\documentclass{article}
\usepackage[a4paper]{geometry}
-\makeatletter\ltj@alljachar %←全部の(>=U+0080な)文字を和文文字扱いに!
+\makeatletter
-\usepackage{luatexja-fontspec}
\usepackage{unicode-math}
-
-\setmathfont{XITSMath}
+\usepackage{luatexja-fontspec}
\setmainjfont{IPAGothic}
+\setmathfont{XITSMath}
+
+\ltj@alljachar %←全部の(>=U+0080な)文字を和文文字扱いに!
+\setmainfont{TexGyreTermes}
-\makeatletter
\reDeclareMathAlphabet{\mathtestA}{\mathrm}{\mathmc}
\reDeclareMathAlphabet{\mathtestB}{\mathrm}{\mathtestb}
\reDeclareMathAlphabet{\mathtestC}{\mathtesta}{\mathmc}
\reDeclareMathAlphabet{\mathtestD}{\mathtesta}{\mathtestb}
\reDeclareMathAlphabet{\mathtestE}{\mathtestE}{\mathmc}
\begin{document}\makeatletter
-
\[
\frac1{1^2}+\frac1{2^2}+\cdots=
\sum_{n=1}^\infty \frac1{n^s}=\zeta(2)=\frac{\pi^2}{6}
\tt\meaning\mathtestD
\tt\meaning\mathtestE
+
+\meaning\lfloor
+\[
+\lceil x\rceil + \lfloor x\rfloor +\hat a-\sqrt{a} - [\hbar]
+\]
\end{document}