What's the coefficient of the $m^4n^4$ term in the expansion of $(m+n)^8$?
Question:
What's the coefficient of the $m^4n^4$ term in the expansion of $(m+n)^8$?
Answer:
Let's think step by step.

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What's the coefficient of the $m^4n^4$ term in the expansion of $(m+n)^8$?
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