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A billing specialist is simplifying the expression $7 - (-4 - 3) - 9 to process a refund. After correctly calculating the value inside the parentheses, the specialist arrives at the intermediate step: $7 - (-7) - 9. According to the rules for subtracting negative integers, which of the following is the correct way to rewrite this expression for the next step?
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A billing specialist is simplifying the expression $7 - (-4 - 3) - 9 to process a refund. After correctly calculating the value inside the parentheses, the specialist arrives at the intermediate step: $7 - (-7) - 9. According to the rules for subtracting negative integers, which of the following is the correct way to rewrite this expression for the next step?