(-3)³+(-3)²+(-3)¹+(-3)°
[tex](-3) ^ { 3 } +(-3) ^ { 2 } +(-3) ^ { 1 } +(-3) ^ { 0 } \\ -27+\left(-3\right)^{2}+\left(-3\right)^{1}+\left(-3\right)^{0} \\ -27+9+\left(-3\right)^{1}+\left(-3\right)^{0} \\ -18+\left(-3\right)^{1}+\left(-3\right)^{0} \\ -18-3+\left(-3\right)^{0} \\ -21+\left(-3\right)^{0} \\ -21+1 \\ - 20[/tex]
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