Раскройте скобки в выражении a - (-x + c - (y - d)).
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a + x - c - y - d
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a + x - c + y + d
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a + x - c + y - d
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a + x + c - y - d
📝 Detailed explanation
a - (-x + c - y + d) = a + x - c + y - d.
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