| 49 | ( | t | − | 4 | ) | ( | t | − | 2 | ) | = | 288 |
| Left side of the equation = | 49 | t | ( | t | − | 2 | ) | − | 49 | × | 4 | ( | t | − | 2 | ) |
| = | 49 | t | ( | t | − | 2 | ) | − | 196 | ( | t | − | 2 | ) |
| = | 49 | t | t | − | 49 | t | × | 2 | − | 196 | ( | t | − | 2 | ) |
| = | 49 | t | t | − | 98 | t | − | 196 | ( | t | − | 2 | ) |
| = | 49 | t | t | − | 98 | t | − | 196 | t | + | 196 | × | 2 |
| = | 49 | t | t | − | 98 | t | − | 196 | t | + | 392 |
| = | 49 | t | t | − | 294 | t | + | 392 |
| 49 | t | t | − | 294 | t | + | 392 | = | 288 |