| 144 | + | ( | 12 | − | x | − | x | ) | ( | 12 | − | x | − | x | ) | = | 2 | ( | x | x | + | ( | 12 | − | x | ) | ( | 12 | − | x | ) | ) |
| 方程左边 = | 144 | + | 12 | ( | 12 | − | x | − | x | ) | − | x | ( | 12 | − | x | − | x | ) | − | x | ( | 12 | − | x | − | x | ) |
| = | 144 | + | 12 | × | 12 | − | 12 | x | − | 12 | x | − | x | ( | 12 | − | x | − | x | ) | − | x | ( | 12 | − | x | − | x | ) |
| = | 144 | + | 144 | − | 12 | x | − | 12 | x | − | x | ( | 12 | − | x | − | x | ) | − | x | ( | 12 | − | x | − | x | ) |
| = | 288 | − | 24 | x | − | x | ( | 12 | − | x | − | x | ) | − | x | ( | 12 | − | x | − | x | ) |
| = | 288 | − | 24 | x | − | x | × | 12 | + | x | x | + | x | x | − | x | ( | 12 | − | x | − | x | ) |
| = | 288 | − | 36 | x | + | x | x | + | x | x | − | x | ( | 12 | − | x | − | x | ) |
| = | 288 | − | 36 | x | + | x | x | + | x | x | − | x | × | 12 | + | x | x | + | x |
| = | 288 | − | 48 | x | + | x | x | + | x | x | + | x | x | + | x | x |
| 288 | − | 48 | x | + | x | x | + | x | x | + | x | x | + | x | x | = | 2 | ( | x | x | + | ( | 12 | − | x | ) | ( | 12 | − | x | ) | ) |
| 方程右边 = | 2 | x | x | + | 2 | ( | 12 | − | x | ) | ( | 12 | − | x | ) |
| = | 2 | x | x | + | 2 | × | 12 | ( | 12 | − | x | ) | − | 2 | x | ( | 12 | − | x | ) |
| = | 2 | x | x | + | 24 | ( | 12 | − | x | ) | − | 2 | x | ( | 12 | − | x | ) |
| = | 2 | x | x | + | 24 | × | 12 | − | 24 | x | − | 2 | x | ( | 12 | − | x | ) |
| = | 2 | x | x | + | 288 | − | 24 | x | − | 2 | x | ( | 12 | − | x | ) |
| = | 2 | x | x | + | 288 | − | 24 | x | − | 2 | x | × | 12 | + | 2 | x | x |
| = | 2 | x | x | + | 288 | − | 24 | x | − | 24 | x | + | 2 | x | x |
| = | 2 | x | x | + | 288 | − | 48 | x | + | 2 | x | x |
| 288 | − | 48 | x | + | x | x | + | x | x | + | x | x | + | x | x | = | 2 | x | x | + | 288 | − | 48 | x | + | 2 | x | x |