/usr/lib/libqwtmathml.so.6abi1 is in libqwtmathml6abi1 6.1.2-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libqwtmathml.so.6.1.2.abi1
/usr/lib/libqwtmathml.so.6.1.2.abi1