-4a^4-8a^3+6a+1-7a+2+6a^3+4a^4
1个回答
-4a^4-8a^3+6a+1-7a+2+6a^3+4a^4
=-4a^4+4a^4 -8a^3+6a^3+6a-7a+1+2
=-2a³-a+3
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