2 9 x 49 July 8, 2019 16 32 64 128 X 9 2 49 0 X 9 2 49 undo squaring by X 2 6x 9 49 X 3 2 2 9 49 X 2 6x 9 49 4 X 2 9 y 2 49 1 2x 9
