| | | | | | | | | | | | | | | | | | | | | | | | | | = | 10 | × | 8 | u | + | 10 | × | 10 | − | 5 | u | − | 5 | × | 4 | = | 75 | u | + | 80 | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 4 | × | 3 | x | − | 4 | × | 10 | y | − | 10 | × | 9 | x | + | 10 | × | 8 | y | = | −78 | x | + | 40 | y | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| (3) | | | | | | | | | | | | | | | | | | | | | | | | | 6 | ( | 8 | a | + | 2 | b | − | 10 | ) | + | 6 | ( | 8 | a | − | 10 | b | + | 5 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 6 | × | 8 | a | + | 6 | × | 2 | b | − | 6 | × | 10 | + | 6 | × | 8 | a | − | 6 | × | 10 | b | + | 6 | × | 5 | = | 96 | a | − | 48 | b | − | 30 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| (4) | | | | | | | | | | | | | | | | | | | | | | | | 8 | ( | 3 | x | + | 5 | y | + | 4 | ) | + | 10 | ( | 8 | x | + | y | − | 8 | ) | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 8 | × | 3 | x | + | 8 | × | 5 | y | + | 8 | × | 4 | + | 10 | × | 8 | x | + | 10 | y | − | 10 | × | 8 | = | 104 | x | + | 50 | y | − | 48 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | = | 6 | × | 9 | u | + | 6 | − | 9 | × | 10 | u | + | 9 | × | 10 | = | −36 | u | + | 96 | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 5 | × | 3 | p | − | 5 | × | 3 | q | − | 10 | × | 5 | p | − | 10 | × | 8 | q | = | −35 | p | − | 95 | q | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| (7) | | | | | | | | | | | | | | | | | | | | | | | | | 7 | ( | 4 | a | + | 2 | b | − | 2 | ) | + | 6 | ( | 7 | a | − | 2 | b | + | 7 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 7 | × | 4 | a | + | 7 | × | 2 | b | − | 7 | × | 2 | + | 6 | × | 7 | a | − | 6 | × | 2 | b | + | 6 | × | 7 | = | 70 | a | + | 2 | b | + | 28 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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