| ( | 1 | + | x | + | 23 10 | ) | = | ( | 1 | + | x | ) | × | 6 5 | ( | 7 5 | × | 5 4 | ) | ( | 1 | + | x | ) |
| Left side of the equation = | 1 | + | x | + | 23 10 |
| = | 33 10 | + | x |
33 10 | + | x | = | ( | 1 | + | x | ) | × | 6 5 | ( | 7 5 | × | 5 4 | ) | ( | 1 | + | x | ) |
| Right side of the equation = | 1 | × | 6 5 | ( | 7 5 | × | 5 4 | ) | ( | 1 | + | x | ) | + | x | × | 6 5 | ( | 7 5 | × | 5 4 | ) | ( | 1 | + | x | ) |
| = | 6 5 | ( | 7 5 | × | 5 4 | ) | ( | 1 | + | x | ) | + | x | × | 6 5 | ( | 7 5 | × | 5 4 | ) | ( | 1 | + | x | ) |
| = | 6 5 | × | 7 5 | × | 5 4 | ( | 1 | + | x | ) | + | x | × | 6 5 | ( | 7 5 | × | 5 4 | ) | ( | 1 | + | x | ) |
| = | 21 10 | ( | 1 | + | x | ) | + | x | × | 6 5 | ( | 7 5 | × | 5 4 | ) | ( | 1 | + | x | ) |
| = | 21 10 | × | 1 | + | 21 10 | x | + | x | × | 6 5 | ( | 7 5 | × | 5 4 | ) | ( | 1 | + | x | ) |
| = | 21 10 | + | 21 10 | x | + | x | × | 6 5 | ( | 7 5 | × | 5 4 | ) | ( | 1 | + | x | ) |
| = | 21 10 | + | 21 10 | x | + | x | × | 6 5 | × | 7 5 | × | 5 4 | ( | 1 | + | x | ) |
| = | 21 10 | + | 21 10 | x | + | x | × | 21 10 | ( | 1 | + | x | ) |
| = | 21 10 | + | 21 10 | x | + | x | × | 21 10 | × | 1 | + | x | × | 21 10 | x |
| = | 21 10 | + | 21 10 | x | + | x | × | 21 10 | + | x | × | 21 10 | x |
| = | 21 10 | + | 21 5 | x | + | x | × | 21 10 | x |
33 10 | + | x | = | 21 10 | + | 21 5 | x | + | x | × | 21 10 | x |