/usr/share/doc/libjlatexmath-fop-java/changelog.Debian.gz is in libjlatexmath-fop-java 1.0.7-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libjlatexmath-fop-java/../libjlatexmath-java/changelog.Debian.gz