14 5 7 3 7 July 8, 2019 16 32 64 128 14 5 7 х 3 7 2 1 3 х 14 5 7 x 3 7 2 1 3 х 14 5 7 х 3 7 4x 14 5 7 3 7 9 14 xy 5 7 3 14 x 4 7