| (1) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | −3 | v | − | 3 | ) | ( | 9 | v | + | 7 | ) | − | ( | 2 | v | + | 5 | ) | ( | −4 | v | − | 6 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | = | −27 | v | − | 48 | v | − | 21 | − | ( | −8 | v | − | 32 | v | − | 30 | ) | | | | | | | | | | | | | | | | | | | | | | | | | |
|
| (2) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | 4 | y | + | 7 | ) | ( | −9 | y | − | 10 | ) | + | ( | −4 | y | − | 6 | ) | ( | 7 | y | + | 9 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | = | −36 | y | − | 103 | y | − | 70 | + | ( | −28 | y | − | 78 | y | − | 54 | ) | | | | | | | | | | | | | | | | | | | | | | | | | |
|
|
|
| (4) | | | | | | | | | | | | | | | | | | | | | | | | | ( | a | + | 8 | ) | ( | a | + | 10 | ) | + | ( | a | − | 2 | ) | ( | a | + | 4 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
|
|
|
| (6) | | | | | | | | | | | | | | | | | | | | | | | | ( | −3 | c | − | 7 | ) | ( | 9 | c | − | 6 | ) | − | 7 | ( | −10 | c | + | 4 | ) | | | | | | | | | | | | | | | | | | | | | | | |
|
| (7) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | 6 | w | + | 4 | ) | ( | 9 | w | − | 3 | ) | − | ( | −8 | w | + | 2 | ) | ( | −5 | w | − | 6 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|