Răspunsuri

2014-11-01T15:53:21+02:00
2014-11-01T16:02:42+02:00
3³ - 3²(2⁶ - 2⁵-2⁴-2³-2²-2¹-2⁰) =
3³ - 3²(64-32-16-8-4-2-1)=
27-9=18