Evaluate -3!

$- 3!$

Expand $3!$ to $3 \cdot 2 \cdot 1$ .

$- (3 \cdot 2 \cdot 1)$

Simplify.

Multiply $3$ by $2$ .

$- (6 \cdot 1)$

Multiply $6$ by $1$ .

$- 1 \cdot 6$

$- 1 \cdot 6$

Multiply $- 1$ by $6$ .

$- 6$

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