| ( | M | + | 3 | ) | ( | M | + | 4 | ) | ( | M | + | 9 | ) | = | 996 |
| 方程左边 = | M | ( | M | + | 4 | ) | ( | M | + | 9 | ) | + | 3 | ( | M | + | 4 | ) | ( | M | + | 9 | ) |
| = | M | M | ( | M | + | 9 | ) | + | M | × | 4 | ( | M | + | 9 | ) | + | 3 | ( | M | + | 4 | ) | ( | M | + | 9 | ) |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | ( | M | + | 9 | ) | + | 3 | ( | M | + | 4 | ) | ( | M | + | 9 | ) |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | M | × | 4 | × | 9 |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | M | × | 36 | + | 3 |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | 36 | M | + | 3 |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | 36 | M | + | 3 |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | 36 | M | + | 3 |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | 36 | M | + | 3 |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | 63 | M | + | 3 |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | 63 | M | + | 3 |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | 63 | M | + | 3 |
| = | M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | 75 | M | + | 3 |
| M | M | M | + | M | M | × | 9 | + | M | × | 4 | M | + | 75 | M | + | 3 | = | 996 |