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C:\_32>perl -MMath::MPFR -e "$z=Math::MPFR->new(0);$z/=-1;print $z" -0
C:\_32>perl -MMath::Pari -e "$x=PARI(0);$x/=-1;print $x" 0 C:\_32>perl -MMath::BigFloat -e "$z=Math::BigFloat->new(0);$z/=-1;prin +t $z" 0