| (1) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | 9 | x | + | 10 | ) | ( | −4 | x | + | 2 | ) | + | ( | 7 | x | − | 4 | ) | ( | 2 | x | − | 10 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | = | −36 | x | − | 22 | x | + | 20 | + | ( | 14 | x | − | 78 | x | + | 40 | ) | | | | | | | | | | | | | | | | | | | | | | | | | |
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| (3) | | | | | | | | | | | | | | | | | | | | | | | | ( | −10 | q | − | 10 | ) | ( | −10 | q | − | 9 | ) | + | 9 | ( | 6 | q | − | 7 | ) | | | | | | | | | | | | | | | | | | | | | | | |
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| (4) | | | | | | | | | | | | | | | | | | | | | | | | | ( | w | + | 4 | ) | ( | w | − | 4 | ) | + | ( | w | + | 8 | ) | ( | w | − | 4 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
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| (5) | | | | | | | | | | | | | | | | | | | | | | | | ( | 8 | x | − | 4 | ) | ( | −4 | x | + | 5 | ) | + | 7 | ( | 8 | x | − | 7 | ) | | | | | | | | | | | | | | | | | | | | | | | |
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| (6) | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | 6 | a | − | 5 | ) | ( | − | a | + | 8 | ) | − | ( | 8 | a | − | 8 | ) | ( | a | − | 5 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| (7) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | 7 | y | + | 2 | ) | ( | 2 | y | + | 6 | ) | − | ( | −3 | y | − | 4 | ) | ( | 2 | y | + | 8 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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