there are unmet dependencies for latest libreoffice.
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
gir1.2-lokdocview-0.1 libreoffice-base libreoffice-gtk3 libreoffice-math
libreoffice-report-builder-bin libreoffice-sdbc-postgresql
0 upgraded, 0 newly installed, 0 to remove and 6 not upgraded.