5 x 4 ) 2 - 33 July 8, 2019 16 32 64 128 5 x 4 )+ 2 - 33 4 x 2 4 0 5 x 33 5 x 4 )+ 2 ≤ 33 4 2 3 7 x 5 33 5 x 4 mũ x 4 mũ 2 x 336 2 x 2 5 5 x 5 x 5 5 x 5 x 5 x 5 x 5