| (1) | | | | | | | | | | | | | | | | | | | | | | | | ( | 7 | x | + | 7 | ) | ( | −10 | x | − | 8 | ) | + | 5 | ( | 2 | x | + | 5 | ) | | | | | | | | | | | | | | | | | | | | | | | |
|
| (2) | | | | | | | | | | | | | | | | | | | | | | | | | ( | r | − | 5 | ) | ( | r | + | 5 | ) | + | ( | r | − | 8 | ) | ( | r | − | 1 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
|
| (3) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | 9 | b | − | 6 | ) | ( | 9 | b | + | 3 | ) | − | ( | 7 | b | − | 2 | ) | ( | −3 | b | + | 6 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | = | 81 | b | − | 27 | b | − | 18 | − | ( | −21 | b | + | 48 | b | − | 12 | ) | | | | | | | | | | | | | | | | | | | | | | | | | |
|
| (4) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | −7 | v | + | 1 | ) | ( | 6 | v | + | 9 | ) | − | ( | −9 | v | − | 2 | ) | ( | 6 | v | + | 5 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | = | −42 | v | − | 57 | v | + | 9 | − | ( | −54 | v | − | 57 | v | − | 10 | ) | | | | | | | | | | | | | | | | | | | | | | | | | |
|
| (5) | | | | | | | | | | | | | | | | | | | | | | | | | ( | z | + | 5 | ) | ( | z | − | 4 | ) | − | ( | z | − | 7 | ) | ( | z | − | 10 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
|
|
|
| (7) | | | | | | | | | | | | | | | | | | | | | | | | | ( | a | − | 9 | ) | ( | a | + | 9 | ) | − | ( | a | + | 10 | ) | ( | a | − | 6 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
|