suma-wektorow-displaystyle-overrightarrowa-left2-2-frac23n

$m=1$m=1 i $n=3$n=3

$m=-9$m=-9 i $n=-21$n=-21

$m=3$m=3 i $n=-9$n=-9

$m=-1$m=-1 i $n=0$n=0