| 1 | ÷ | ( | D | + | 3 | ) | = | 1 | ÷ | ( | D | + | 1 | ) | + | 1 | ÷ | ( | D | + | 2 | ) |
| 方程两边同时乘以: | ( | D | + | 3 | ) | , | ( | D | + | 1 | ) |
| 1 | ( | D | + | 1 | ) | = | 1 | ( | D | + | 3 | ) | + | 1 | ÷ | ( | D | + | 2 | ) | × | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | + | 1 | × | 1 | = | 1 | ( | D | + | 3 | ) | + | 1 | ÷ | ( | D | + | 2 | ) | × | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | + | 1 | × | 1 | = | 1 | D | + | 1 | × | 3 | + | 1 | ÷ | ( | D | + | 2 | ) | × | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | + | 1 | = | 1 | D | + | 3 | + | 1 | ÷ | ( | D | + | 2 | ) | × | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 方程两边同时乘以: | ( | D | + | 2 | ) |
| 1 | D | ( | D | + | 2 | ) | + | 1 | ( | D | + | 2 | ) | = | 1 | D | ( | D | + | 2 | ) | + | 3 | ( | D | + | 2 | ) | + | 1 | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | D | + | 1 | D | × | 2 | + | 1 | ( | D | + | 2 | ) | = | 1 | D | ( | D | + | 2 | ) | + | 3 | ( | D | + | 2 | ) | + | 1 | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | D | + | 1 | D | × | 2 | + | 1 | ( | D | + | 2 | ) | = | 1 | D | D | + | 1 | D | × | 2 | + | 3 | ( | D | + | 2 | ) | + | 1 | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | D | + | 2 | D | + | 1 | ( | D | + | 2 | ) | = | 1 | D | D | + | 2 | D | + | 3 | ( | D | + | 2 | ) | + | 1 | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | D | + | 2 | D | + | 1 | D | + | 1 | × | 2 | = | 1 | D | D | + | 2 | D | + | 3 | ( | D | + | 2 | ) | + | 1 | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | D | + | 2 | D | + | 1 | D | + | 1 | × | 2 | = | 1 | D | D | + | 2 | D | + | 3 | D | + | 3 | × | 2 | + | 1 | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | D | + | 2 | D | + | 1 | D | + | 2 | = | 1 | D | D | + | 2 | D | + | 3 | D | + | 6 | + | 1 | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | D | + | 3 | D | + | 2 | = | 1 | D | D | + | 5 | D | + | 6 | + | 1 | ( | D | + | 3 | ) | ( | D | + | 1 | ) |
| 1 | D | D | + | 3 | D | + | 2 | = | 1 | D | D | + | 5 | D | + | 6 | + | 1 | D | ( | D | + | 1 | ) | + | 1 | × | 3 | ( | D | + | 1 | ) |
| 1 | D | D | + | 3 | D | + | 2 | = | 1 | D | D | + | 5 | D | + | 6 | + | 1 | D | ( | D | + | 1 | ) | + | 3 | ( | D | + | 1 | ) |
| 1 | D | D | + | 3 | D | + | 2 | = | 1 | D | D | + | 5 | D | + | 6 | + | 1 | D | D | + | 1 | D | × | 1 |
| 1 | D | D | + | 3 | D | + | 2 | = | 1 | D | D | + | 5 | D | + | 6 | + | 1 | D | D | + | 1 | D | + | 3 |
| 1 | D | D | + | 3 | D | + | 2 | = | 1 | D | D | + | 6 | D | + | 6 | + | 1 | D | D | + | 3 | ( | D | + | 1 | ) |
| 1 | D | D | + | 3 | D | + | 2 | = | 1 | D | D | + | 6 | D | + | 6 | + | 1 | D | D | + | 3 | D | + | 3 |
| 1 | D | D | + | 3 | D | + | 2 | = | 1 | D | D | + | 6 | D | + | 6 | + | 1 | D | D | + | 3 | D | + | 3 |
| 1 | D | D | + | 3 | D | + | 2 | = | 1 | D | D | + | 9 | D | + | 9 | + | 1 | D | D |