Add or subtract as indicated.(3n7 + 13n4 + 13) - (-18n4 + 5n7 + 18)

A. -2n7 + 31n4 - 5
B. -2n7 + 31n4 + 31
C. 24n11
D. -2n7 + 18n4 + 31


Answer: A

Mathematics

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