Question 585439
(5a^5-2a^3-9a^2)+(2a^5+a^3)+(-a^5-3a^2)


5a^5-2a^3-9a^2+2a^5+a^3+-a^5-3a^2


(5a^5+2a^5-a^5)+(-2a^3+a^3)+(-9a^2-3a^2)


6a^5-a^3-12a^2



So (5a^5-2a^3-9a^2)+(2a^5+a^3)+(-a^5-3a^2) completely simplifies to 6a^5-a^3-12a^2

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