| 1 | ÷ | S | + | 1 | ÷ | ( | S | + | 5 | ) | + | 1 | ÷ | ( | S | + | 6 | ) | + | 1 | ÷ | ( | S | S | + | 2 | S | + | 2 | ) | = | 0 |
| 方程两边同时乘以: | S |
| 1 | + | 1 | ÷ | ( | S | + | 5 | ) | × | S | + | 1 | ÷ | ( | S | + | 6 | ) | × | S | + | 1 | ÷ | ( | S | S | + | 2 | S | + | 2 | ) | × | S | = | 0 |
| 方程两边同时乘以: | ( | S | + | 5 | ) |
| 1 | ( | S | + | 5 | ) | + | 1 | S | + | 1 | ÷ | ( | S | + | 6 | ) | × | S | ( | S | + | 5 | ) | + | 1 | ÷ | ( | S | S | + | 2 | S | + | 2 | ) | × | S | ( | S | + | 5 | ) | = | 0 |
| 1 | S | + | 1 | × | 5 | + | 1 | S | + | 1 | ÷ | ( | S | + | 6 | ) | × | S | ( | S | + | 5 | ) | + | 1 | ÷ | ( | S | S | + | 2 | S | + | 2 | ) | = | 0 |
| 1 | S | + | 5 | + | 1 | S | + | 1 | ÷ | ( | S | + | 6 | ) | × | S | ( | S | + | 5 | ) | + | 1 | ÷ | ( | S | S | + | 2 | S | + | 2 | ) | × | S | = | 0 |
| 2 | S | + | 5 | + | 1 | ÷ | ( | S | + | 6 | ) | × | S | ( | S | + | 5 | ) | + | 1 | ÷ | ( | S | S | + | 2 | S | + | 2 | ) | × | S | ( | S | + | 5 | ) | = | 0 |
| 方程两边同时乘以: | ( | S | + | 6 | ) |
| 2 | S | ( | S | + | 6 | ) | + | 5 | ( | S | + | 6 | ) | + | 1 | S | ( | S | + | 5 | ) | + | 1 | ÷ | ( | S | S | + | 2 | S | + | 2 | ) | × | S | ( | S | + | 5 | ) | = | 0 |
| 2 | S | S | + | 2 | S | × | 6 | + | 5 | ( | S | + | 6 | ) | + | 1 | S | ( | S | + | 5 | ) | + | 1 | = | 0 |
| 2 | S | S | + | 12 | S | + | 5 | ( | S | + | 6 | ) | + | 1 | S | ( | S | + | 5 | ) | + | 1 | ÷ | ( | S | S | + | 2 | S | + | 2 | ) | = | 0 |
| 方程两边同时乘以: | ( | S | S | + | 2 | S | + | 2 | ) |
| 2 | S | S | ( | S | S | + | 2 | S | + | 2 | ) | + | 12 | S | ( | S | S | + | 2 | S | + | 2 | ) | + | 5 | ( | S | + | 6 | ) | ( | S | S | + | 2 | S | + | 2 | ) | + | 1 | S | = | 0 |
| 2 | S | S | S | S | + | 2 | S | S | × | 2 | S | + | 2 | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |
| 2 | S | S | S | S | + | 4 | S | S | S | + | 4 | S | S | = | 0 |