Hi,
I see many web sites are suggesting to install LibreOffice 4.2 by adding a ppa:libreoffice/ppa
to Ubuntu 12.04 or Ubuntu 13.10, but this PPA is LibreOffice unstable and alfa, beta and release candidates will land in this PPA. So unstable repository that most of the users probably don’t want to have. Install LibreOffice 4.2.x from above PPA only if you would like to test alfa, beta, release candidates etc.
Install LibreOffice 4.2.x stable (including stable fix releases) then do the following (in Terminal):
(1) Add LibreOffice 4.2 PPA:
sudo add-apt-repository ppa:libreoffice/libreoffice-4-2
(2) Update repository:
sudo apt-get update
(3) Install LibreOffice 4.2:
sudo apt-get install libreoffice
Hope this helps.
Regards