| ( | 4 | − | 4 | ÷ | 5 | × | m | m | + | 24 | ÷ | 5 | × | m | − | 4 | ) | × | 5 | − | 10 | − | m | ( | 4 | − | 4 | ÷ | 5 | × | m | m | + | 24 | ÷ | 5 | × | m | − | 4 | ) | ÷ | 2 | − | ( | 5 | − | m | ) | ( | 4 | − | 4 | ÷ | 5 | × | m | m | + | 24 | ÷ | 5 | × | m | − | 4 | ) | ÷ | 2 | = | 0 |
| 方程左边 = | 4 | × | 5 | − | 4 | ÷ | 5 | × | m | m | × | 5 | + | 24 | ÷ | 5 | × | m | × | 5 | − | 4 |
| = | 20 | − | 4 | m | m | + | 24 | m | − | 20 | − | 10 | − | m | ( | 4 | − | 4 | ÷ | 5 | × | m | m | + | 24 | ÷ | 5 | × | m | − | 4 | ) | × | 1 2 | − | ( | 5 | − | m | ) |
| = | - | 10 | − | 4 | m | m | + | 24 | m | − | m | ( | 4 | − | 4 | ÷ | 5 | × | m | m | + | 24 | ÷ | 5 | × | m | − | 4 | ) | × | 1 2 | − | ( | 5 | − | m | ) | ( | 4 | − | 4 | ÷ | 5 | × | m | m | + | 24 | ÷ | 5 | × | m | − | 4 | ) | × | 1 2 |
| = | - | 10 | − | 4 | m | m | + | 24 | m | − | m | × | 4 | × | 1 2 | + | m | × | 4 | ÷ | 5 |
| = | - | 10 | − | 4 | m | m | + | 24 | m | − | m | × | 2 | + | m | × | 2 5 | m | m |
| = | - | 10 | − | 4 | m | m | + | 24 | m | + | m | × | 2 5 | m | m | − | m | × | 12 5 |
| = | - | 10 | − | 4 | m | m | + | 24 | m | + | m | × | 2 5 | m | m | − | m | × | 12 5 |
| = | - | 10 | − | 4 | m | m | + | 24 | m | + | m | × | 2 5 | m | m | − | m | × | 12 5 |
| = | - | 10 | − | 4 | m | m | + | 24 | m | + | m | × | 2 5 | m | m | − | m | × | 12 5 |
| = | - | 10 | − | 4 | m | m | + | 24 | m | + | m | × | 2 5 | m | m | − | m | × | 12 5 |
| = | - | 10 | − | 4 | m | m | + | 12 | m | + | m | × | 2 5 | m | m | − | m | × | 12 5 |
| = | - | 10 | − | 4 | m | m | + | 12 | m | + | m | × | 2 5 | m | m | − | m | × | 12 5 |
| = | - | 10 | − | 4 | m | m | + | 12 | m | + | m | × | 2 5 | m | m | − | m | × | 12 5 |
| = | - | 10 | − | 4 | m | m | + | 12 | m | + | m | × | 2 5 | m | m | − | m | × | 12 5 |
| - | 10 | − | 4 | m | m | + | 12 | m | + | m | × | 2 5 | m | m | − | m | × | 12 5 | = | 0 |