/usr/ is in libklatexformula3-dev 3.2.8-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/klfbackend/
/usr/include/klfbackend/klfblockprocess.h
/usr/include/klfbackend/klfdefs.h
/usr/include/klfbackend/klfdebug.h
/usr/include/klfbackend/klfbackend.h
/usr/include/klftools/
/usr/include/klftools/qtcolortriangle.h
/usr/include/klftools/klfunitinput.h
/usr/include/klftools/klfcolorchooser.h
/usr/include/klftools/klfstyle.h
/usr/include/klftools/klffactory.h
/usr/include/klftools/klfpixmapbutton.h
/usr/include/klftools/klfpobj.h
/usr/include/klftools/klfpathchooser.h
/usr/include/klftools/klfsearchbar.h
/usr/include/klftools/klfutil.h
/usr/include/klftools/klfguiutil.h
/usr/include/klftools/klfdisplaylabel.h
/usr/include/klftools/klfiteratorsearchable.h
/usr/include/klfapp/
/usr/include/klfapp/klflibview.h
/usr/include/klfapp/klflatexsymbols.h
/usr/include/klfapp/klfstylemanager.h
/usr/include/klfapp/klfconfig.h
/usr/include/klfapp/klflatexedit.h
/usr/include/klfapp/klfmainwin.h
/usr/include/klfapp/klflib.h
/usr/include/klfapp/klfmime.h
/usr/include/klfapp/klflibentryeditor.h
/usr/include/klfapp/klfdbus.h
/usr/include/klfapp/klflibdbengine.h
/usr/include/klfapp/klfmain.h
/usr/include/klfapp/klflibbrowser.h
/usr/include/klfapp/klfliblegacyengine.h
/usr/include/klfapp/klfpluginiface.h
/usr/include/klfapp/klfsettings.h
/usr/lib/
/usr/share/
/usr/share/doc/
/usr/share/doc/libklatexformula3-dev/
/usr/share/doc/libklatexformula3-dev/copyright
/usr/lib/libklfapp.so
/usr/lib/libklfbackend.so
/usr/lib/libklftools.so
/usr/share/doc/libklatexformula3-dev/README
/usr/share/doc/libklatexformula3-dev/AUTHORS
/usr/share/doc/libklatexformula3-dev/changelog.Debian.gz