| y | = | - | 1 | ÷ | 4 | × | ( | 0 | − | 2 | ) | ( | 0 | − | 2 | ) |
| 方程右边 = | - | 1 4 | ( | 0 | − | 2 | ) | ( | 0 | − | 2 | ) |
| y | = | - | 1 4 | ( | 0 | − | 2 | ) | ( | 0 | − | 2 | ) |
| 方程右边 = | - | 1 4 | × | 0 | ( | 0 | − | 2 | ) | + | 1 4 | × | 2 | ( | 0 | − | 2 | ) |
| = | - | 0 | ( | 0 | − | 2 | ) | + | 1 2 | ( | 0 | − | 2 | ) |
| = | - | 0 | × | 0 | + | 0 | × | 2 | + | 1 2 | ( | 0 | − | 2 | ) |
| = | - | 0 | + | 0 | + | 1 2 | ( | 0 | − | 2 | ) |
| = | - | 0 | + | 1 2 | ( | 0 | − | 2 | ) |
| = | - | 0 | + | 1 2 | × | 0 | − | 1 2 | × | 2 |
| = | - | 0 | + | 0 | − | 1 |
| = | - | 1 |
| y | = | - | 1 |