| ( | 6 | − | 2 | x | ) | ( | 6 | − | 6 | x | ) | ( | 5 | − | 2 | x | ) | − | 36 | − | 9 | ( | 6 | − | 2 | x | ) | − | 9 | ( | 5 | − | 2 | x | ) | − | 4 | ( | 6 | − | 6 | x | ) | = | 0 |
| Left side of the equation = | 6 | ( | 6 | − | 6 | x | ) | ( | 5 | − | 2 | x | ) | − | 2 | x | ( | 6 | − | 6 | x | ) | ( | 5 | − | 2 | x | ) | − | 36 | − | 9 | ( | 6 | − | 2 | x | ) | − | 9 | ( | 5 | − | 2 | x | ) |
| = | 6 | × | 6 | ( | 5 | − | 2 | x | ) | − | 6 | × | 6 | x | ( | 5 | − | 2 | x | ) | − | 2 | x | ( | 6 | − | 6 | x | ) | ( | 5 | − | 2 | x | ) | − | 36 |
| = | 36 | ( | 5 | − | 2 | x | ) | − | 36 | x | ( | 5 | − | 2 | x | ) | − | 2 | x | ( | 6 | − | 6 | x | ) | ( | 5 | − | 2 | x | ) | − | 36 | − | 9 | ( | 6 | − | 2 | x | ) |
| = | 36 | × | 5 | − | 36 | × | 2 | x | − | 36 | x | ( | 5 | − | 2 | x | ) | − | 2 | x | ( | 6 | − | 6 | x | ) | ( | 5 | − | 2 | x | ) |
| = | 180 | − | 72 | x | − | 36 | x | ( | 5 | − | 2 | x | ) | − | 2 | x | ( | 6 | − | 6 | x | ) | ( | 5 | − | 2 | x | ) | − | 36 | − | 9 |
| = | 144 | − | 72 | x | − | 36 | x | ( | 5 | − | 2 | x | ) | − | 2 | x | ( | 6 | − | 6 | x | ) | ( | 5 | − | 2 | x | ) | − | 9 | ( | 6 | − | 2 | x | ) |
| = | 144 | − | 72 | x | − | 36 | x | × | 5 | + | 36 | x | × | 2 | x | − | 2 | x |
| = | 144 | − | 72 | x | − | 180 | x | + | 72 | x | x | − | 2 | x | ( | 6 | − | 6 | x | ) | ( | 5 | − | 2 | x | ) |
| = | 144 | − | 252 | x | + | 72 | x | x | − | 2 | x | ( | 6 | − | 6 | x | ) | ( | 5 | − | 2 | x | ) | − | 9 | ( | 6 | − | 2 | x | ) |
| = | 144 | − | 252 | x | + | 72 | x | x | − | 2 | x | × | 6 | ( | 5 | − | 2 | x | ) | + | 2 | x |
| = | 144 | − | 252 | x | + | 72 | x | x | − | 12 | x | ( | 5 | − | 2 | x | ) | + | 12 | x | x |
| = | 144 | − | 252 | x | + | 72 | x | x | − | 12 | x | × | 5 | + | 12 | x | × | 2 |
| = | 144 | − | 252 | x | + | 72 | x | x | − | 60 | x | + | 24 | x | x | + | 12 |
| = | 144 | − | 312 | x | + | 72 | x | x | + | 24 | x | x | + | 12 | x | x |
| = | 144 | − | 312 | x | + | 72 | x | x | + | 24 | x | x | + | 12 | x | x |
| = | 144 | − | 312 | x | + | 72 | x | x | + | 24 | x | x | + | 60 | x | x |
| = | 144 | − | 312 | x | + | 72 | x | x | + | 24 | x | x | + | 60 | x | x |
| = | 144 | − | 312 | x | + | 72 | x | x | + | 24 | x | x | + | 60 | x | x |
| = | 90 | − | 294 | x | + | 72 | x | x | + | 24 | x | x | + | 60 | x | x |
| = | 90 | − | 294 | x | + | 72 | x | x | + | 24 | x | x | + | 60 | x | x |
| = | 90 | − | 294 | x | + | 72 | x | x | + | 24 | x | x | + | 60 | x | x |
| = | 45 | − | 276 | x | + | 72 | x | x | + | 24 | x | x | + | 60 | x | x |
| = | 45 | − | 276 | x | + | 72 | x | x | + | 24 | x | x | + | 60 | x | x |
| = | 45 | − | 276 | x | + | 72 | x | x | + | 24 | x | x | + | 60 | x | x |
| = | 21 | − | 252 | x | + | 72 | x | x | + | 24 | x | x | + | 60 | x | x |