What is the constant term in the expansion of $(x^4+x+5)(x^5+x^3+15)$?
Question:
What is the constant term in the expansion of $(x^4+x+5)(x^5+x^3+15)$?
Answer:
Let's think step by step.

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What is the constant term in the expansion of $(x^4+x+5)(x^5+x^3+15)$?
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