| n | ( | n | + | 1 | ) | ( | 2 | n | − | 1 | ) | = | 462 |
| Left side of the equation = | n | n | ( | 2 | n | − | 1 | ) | + | n | × | 1 | ( | 2 | n | − | 1 | ) |
| = | n | n | × | 2 | n | − | n | n | × | 1 | + | n | × | 1 | ( | 2 | n | − | 1 | ) |
| = | n | n | × | 2 | n | − | n | n | × | 1 | + | n | × | 1 | × | 2 | n | − | n |
| = | n | n | × | 2 | n | − | n | n | × | 1 | + | n | × | 2 | n | − | n | × | 1 |
| n | n | × | 2 | n | − | n | n | × | 1 | + | n | × | 2 | n | − | 1 | n | = | 462 |