\ltjsetparameter{jacharrange={-1, +2, +3, -4, -5, +6, +7, +8}}
\directlua{for x=128,255 do luatexja.math.is_math_letters[x] = true end}
-\let\ltj@@orig@end=\end
-\outer\protected\def\end{%
- \directlua{luatexja.direction.remove_end_whatsit()}\ltj@@orig@end}
+\let\ltj@@orig@end=\@@end
+\protected\def\@@end{%
+ \directlua{luatexja.ext_cleanup()}\ltj@@orig@end}
%%------------------ all done
\ltj@plain@AtEnd