| (1) | | | | | | | | | | | | | | | | | | | | | | | | ( | −8 | x | − | 4 | ) | ( | −10 | x | − | 1 | ) | − | 6 | ( | 10 | x | + | 6 | ) | | | | | | | | | | | | | | | | | | | | | | | |
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| (2) | | | | | | | | | | | | | | | | | | | | | | | | | ( | z | + | 1 | ) | ( | z | − | 3 | ) | − | ( | z | + | 7 | ) | ( | z | + | 2 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
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| (4) | | | | | | | | | | | | | | | | | | | | | | | | | ( | r | + | 9 | ) | ( | r | − | 9 | ) | − | ( | r | + | 2 | ) | ( | r | − | 5 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
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| (5) | | | | | | | | | | | | | | | | | | | | | | | | ( | −6 | y | − | 4 | ) | ( | 3 | y | + | 3 | ) | − | 9 | ( | 9 | y | + | 4 | ) | | | | | | | | | | | | | | | | | | | | | | | |
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| (6) | | | | | | | | | | | | | | | | | | | | | | | | | ( | u | − | 8 | ) | ( | u | + | 8 | ) | + | ( | u | − | 2 | ) | ( | u | + | 6 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
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| (7) | | | | | | | | | | | | | | | | | | | | | | | | ( | − | b | − | 7 | ) | ( | 8 | b | + | 5 | ) | − | 2 | ( | −7 | b | − | 10 | ) | | | | | | | | | | | | | | | | | | | | | | | |
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