1508144 - 823568 = 684576456 * 2 = 912684576 - 148427485 + 912 = -147834997
Therefore, the result is -147834997.
1508144 - 823568 = 684576
456 * 2 = 912
684576 - 148427485 + 912 = -147834997
Therefore, the result is -147834997.