2 1 3 x 5 4 21 July 8, 2019 16 32 64 128 1 2 3 4 5 x 210 2 3 3x 9 )- 4 1 3 9x 21 )-( x 5 2 x 2 5 2 + 3 + 4 + 5 + 6
