## Thinking Mathematically (6th Edition)

$\color{blue}{\left\{..., -3, -2, -1, 0, 1, 2, 3, ...\right\}}$
The set $\left\{..., -3, -2, -1, 0, 1, 2, 3, ...\right\}$ is known as the set of integers. Thus, the missing expression in the given statement is: $\color{blue}{\left\{..., -3, -2, -1, 0, 1, 2, 3, ...\right\}}$