Add.(8n7 + 7n - 6n5) + (-5n5 + 6n7 + 3n)
A. 13n7 + 3n5 - 3n
B. 13n13
C. 14n7 - 11n5 + 10n
D. 14n - 11n7 + 10n5
Answer: C
Mathematics
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