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| (2) | | | | | | | | | | | | | | | | | | | | | | | | | ( | q | − | 5 | ) | ( | q | + | 5 | ) | + | ( | q | − | 5 | ) | ( | q | + | 7 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
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| (3) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | −4 | r | + | 6 | ) | ( | 8 | r | + | 7 | ) | − | ( | −4 | r | + | 2 | ) | ( | 3 | r | + | 3 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| (5) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | 3 | x | − | 1 | ) | ( | 6 | x | − | 10 | ) | + | ( | −7 | x | − | 8 | ) | ( | −3 | x | + | 10 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| (6) | | | | | | | | | | | | | | | | | | | | | | | | ( | 5 | y | + | 6 | ) | ( | 5 | y | − | 6 | ) | − | 10 | ( | −4 | y | + | 2 | ) | | | | | | | | | | | | | | | | | | | | | | | |
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| (7) | | | | | | | | | | | | | | | | | | | | | | | | | ( | p | + | 3 | ) | ( | p | + | 6 | ) | − | ( | p | + | 10 | ) | ( | p | − | 10 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
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