Answer:
4x^5 - 3x^4 + 5x^2 - 5x
Explanation:
(5x^2-2x^3+x) + (4x^5-3x^4+2x^3-5x)
= 5x^2 - 2x^3 + x + 4x^5 - 3x^4 + 2x^3 - 5x
= 4x^5 - 3x^4 + 5x^2 - 5x
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