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23. λ€νμ \((x^3 + 3)^5\) μ μ κ°μμμ \(x^9\) μ κ³μλ? [2μ ] \begin{itemize} \item[1] 30 \item[2] 60 \item[3] 90 \item[4] 120 \item[5] 150 \end{itemize}