12 2 x 2 10 2 July 8, 2019 16 32 64 128 12 x 3 2 2 2 10 12 2x x 2 10 x 2 x 20 24 2 x 10 2 x 12 X 12 2 y − 10 2 289 S 2 x 10 2 x 12 2 x 14 12 25 2 2 x 10 5 12 /10 x2