\left. \begin{array} { l } { [ ( 18 + 3 \cdot 2 ) : 8 + 5 \cdot 3 ] : 6 } \\ { 60 : \{ 2 \cdot [ 7 + 18 : ( 12 - 3 ) ] \} - [ 7 \cdot 3 \cdot 18 : 2 + 1 ] } \end{array} \right.
Evaluate
3,\ -\frac{560}{3}
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