4 2 12 4 5 July 8, 2019 16 32 64 128 5x 4 2 )+ 12 4 4 7y 2 5y 12 4 1 9 4 7у 2 5у 12 4 1 9 4 5 x 12 4 6 2 4 2 12 5 0 4 5n 12 4 2n 1 2 9n
