apt install musescore

env LANG=C apt install --dry-run musescore
NOTE: This is only a simulation!
      apt needs root privileges for real execution.
      Keep also in mind that locking is deactivated,
      so don't depend on the relevance to the real current situation!
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 musescore : Depends: libqt5core5a (< 5.10) but 5.14.1+dfsg-0+xneon+18.04+bionic+build81 is to be installed
             Depends: qtbase-abi-5-9-5
E: Unable to correct problems, you have held broken packages.