M
manhngughe


Thực hiện phép tính
a) $3x^n[6x^n-3)+1]-2x^2[(9x^n-3)-1]$
b)$(5^n+1)-4*5^n$
c)$6^2*6^4-4^3[(3^6)-1]$
a) $3x^n[6x^n-3)+1]-2x^2[(9x^n-3)-1]$
b)$(5^n+1)-4*5^n$
c)$6^2*6^4-4^3[(3^6)-1]$
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