| ( | x | ( | x | − | 1 | ) | ) | ÷ | 2 | × | ( | ( | x | + | 1 | ) | ( | x | + | 6 | ) | ) | ÷ | 3 | − | ( | ( | x | + | 1 | ) | ( | x | − | 1 | ) | ) | ÷ | 6 | = | 1 |
| 方程左边 = | ( | x | ( | x | − | 1 | ) | ) | × | 1 6 | ( | ( | x | + | 1 | ) | ( | x | + | 6 | ) | ) | − | ( | ( | x | + | 1 | ) | ( | x | − | 1 | ) | ) | × | 1 6 |
| ( | x | ( | x | − | 1 | ) | ) | × | 1 6 | ( | ( | x | + | 1 | ) | ( | x | + | 6 | ) | ) | − | ( | ( | x | + | 1 | ) | ( | x | − | 1 | ) | ) | × | 1 6 | = | 1 |
| 方程左边 = | x | ( | x | − | 1 | ) | × | 1 6 | ( | ( | x | + | 1 | ) | ( | x | + | 6 | ) | ) | − | ( | ( | x | + | 1 | ) | ( | x | − | 1 | ) | ) | × | 1 6 |
| = | x | x | × | 1 6 | ( | ( | x | + | 1 | ) | ( | x | + | 6 | ) | ) | − | x | × | 1 | × | 1 6 | ( | ( | x | + | 1 | ) | ( | x | + | 6 | ) | ) | − | ( | ( | x | + | 1 | ) | ( | x | − | 1 | ) | ) | × | 1 6 |
| = | x | x | × | 1 6 | ( | ( | x | + | 1 | ) | ( | x | + | 6 | ) | ) | − | x | × | 1 6 | ( | ( | x | + | 1 | ) | ( | x | + | 6 | ) | ) | − | ( | ( | x | + | 1 | ) | ( | x | − | 1 | ) | ) | × | 1 6 |
| = | x | x | × | 1 6 | ( | x | + | 1 | ) | ( | x | + | 6 | ) | − | x | × | 1 6 | ( | ( | x | + | 1 | ) | ( | x | + | 6 | ) | ) | − | ( | ( | x | + | 1 | ) | ( | x | − | 1 | ) | ) | × | 1 6 |
| = | x | x | × | 1 6 | x | ( | x | + | 6 | ) | + | x | x | × | 1 6 | × | 1 | ( | x | + | 6 | ) | − | x | × | 1 6 |
| = | x | x | × | 1 6 | x | ( | x | + | 6 | ) | + | x | x | × | 1 6 | ( | x | + | 6 | ) | − | x | × | 1 6 | ( | ( | x | + | 1 | ) | ( | x | + | 6 | ) | ) |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 6 | x | × | 6 | + | x | x |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |
| = | x | x | × | 1 6 | x | x | + | x | x | × | 1 | x | + | x | x | × | 1 6 |