Aptitude depends

Question

How do i fix this? I also did sudo apt-get -f install but same error

The following packages have unmet dependencies:
  aptitude: Depends: libapt-pkg4.12 (>= 0.8.16~exp12ubuntu6) but it is not installed
            Depends: libboost-iostreams1.46.1 (>= 1.46.1-1) but it is not installed
            Depends: libept1.4.12 but it is not installed
            Depends: libstdc++6 (>= 4.6) but 4.4.3-4ubuntu5.1 is installed
            Depends: libtinfo5 but it is not installed
            Depends: libxapian22 but it is not installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
E: Unable to correct dependencies