计算:-2a^n(3a^(n+1)+4a-1)=
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计算:-2a^n(3a^(n+1)+4a-1)=
计算:-2a^n(3a^(n+1)+4a-1)=
计算:-2a^n(3a^(n+1)+4a-1)=
原式=-6a^(2n+1)-8a^(n+1)+2a^n
分式 计算:a^(2n+1)-6a^(2n)+9a^(2n-1) / a^(n+1)-4a^n+3a^(n-1)
计算:(3a^n+2+6a^n+1-9^n)÷3a^n-1
计算:(a^n+1)^2×(-a^3)^2n+1
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计算:-2a^n(3a^(n+1)+4a-1)=
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计算:(6a^n+2-9a^n+1+3a^n-1)÷3a^n-1
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