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| (2) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | 7 | b | + | 9 | ) | ( | −10 | b | − | 6 | ) | − | ( | −8 | b | − | 3 | ) | ( | 8 | b | + | 3 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | = | −70 | b | − | 132 | b | − | 54 | − | ( | −64 | b | − | 48 | b | − | 9 | ) | | | | | | | | | | | | | | | | | | | | | | | | | |
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| (4) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ( | −10 | c | + | 10 | ) | ( | 6 | c | + | 9 | ) | + | ( | 7 | c | − | 7 | ) | ( | −2 | c | + | 7 | ) | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | = | −60 | c | − | 30 | c | + | 90 | + | ( | −14 | c | + | 63 | c | − | 49 | ) | | | | | | | | | | | | | | | | | | | | | | | | | |
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| (5) | | | | | | | | | | | | | | | | | | | | | | | | | ( | y | − | 7 | ) | ( | y | + | 7 | ) | + | ( | y | − | 10 | ) | ( | y | − | 1 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
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| (6) | | | | | | | | | | | | | | | | | | | | | | | | | ( | c | − | 9 | ) | ( | c | + | 9 | ) | − | ( | c | + | 4 | ) | ( | c | + | 9 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
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| (7) | | | | | | | | | | | | | | | | | | | | | | | | ( | 3 | x | + | 9 | ) | ( | −3 | x | − | 9 | ) | − | 4 | ( | −8 | x | − | 1 | ) | | | | | | | | | | | | | | | | | | | | | | | |
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