| ( | x | + | 25 | ) | ( | x | + | 4 | ) | ( | x | + | 1 4 | ) | = | 62500 |
| Left side of the equation = | x | ( | x | + | 4 | ) | ( | x | + | 1 4 | ) | + | 25 | ( | x | + | 4 | ) | ( | x | + | 1 4 | ) |
| = | x | x | ( | x | + | 1 4 | ) | + | x | × | 4 | ( | x | + | 1 4 | ) | + | 25 | ( | x | + | 4 | ) | ( | x | + | 1 4 | ) |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | ( | x | + | 1 4 | ) | + | 25 | ( | x | + | 4 | ) | ( | x | + | 1 4 | ) |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | x | × | 4 | × | 1 4 |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | x | × | 1 | + | 25 |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | 1 | x | + | 25 |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | 1 | x | + | 25 |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | 1 | x | + | 25 |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | 1 | x | + | 25 |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | 29 4 | x | + | 25 |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | 29 4 | x | + | 25 |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | 29 4 | x | + | 25 |
| = | x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | 429 4 | x | + | 25 |
| x | x | x | + | x | x | × | 1 4 | + | x | × | 4 | x | + | 429 4 | x | + | 25 | = | 62500 |