I just had to verify still exists in the latest version of libreoffice, and thus had to download the latest .deb packages from libreoffice and install them.
Although everything is kept clean and separate under /opt/libreoffice6.0, it is still some overhead to install the packages, probably error prone with different versions, and still more or less some sort of pollution of an otherwise clean install from a linux vendor.
I recently had a similar testing problem with kdenlive, and they are offering an AppImage as well. See https://kdenlive.org/download/
This is all, what the application needs (here the contents of your 41 .deb packages), packed into one squashfs container together with a binary that automatically mounts and starts it. Just download the file, chmod u+x, and start it. No installation, no need to clean anything afterwards, and pretty simple to keep as many versions on your system as you want. This was really dead simple and easy to test, and it didn't modify the system in any way. Just delete the file afterwards.
Should be simple to create and could make testing easier.
*** This bug has been marked as a duplicate of bug 97269 ***