Finite Math Examples

$8 (9) = 9 (9 - 1)$ , $8 (9) + 8 (81) = 9 (81 - 1)$ , $8 (9) + 8 (81) + 8 (729) = 9 (729 - 1)$ , $8 (9) + 8 (81) + 8 (729) + 8 (6561) = 9 (6561 - 1)$

Step 1

$8 (9) = 9 (9 - 1), 8 (9) + 8 (81) = 9 (81 - 1), 8 (9) + 8 (81) + 8 (729) = 9 (729 - 1), 8 (9) + 8 (81) + 8 (729) + 8 (6561) = 9 (6561 - 1)$