Evaluate: 6-2 (4+5)-6

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Expression: $$6 - 2 ( 4 + 5 ) - 6$$

Add $4$ and $5$ to get $9$.

$$6-2\times 9-6$$

Multiply $2$ and $9$ to get $18$.

$$6-18-6$$

Subtract $18$ from $6$ to get $-12$.

$$-12-6$$

Subtract $6$ from $-12$ to get $-18$.

$$-18$$

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