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(-2 + 1) + 5(12:3)-9=
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(-2 + 1) + 5(12:3)-9=

User Aditya Gupta
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\begin{gathered} (-2+1)^2+5(12*(1)/(3))-9 \\ (-1)^2+5(4)-9 \\ 1+20-9 \\ 21-9 \\ 12 \end{gathered}

User Thromordyn
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