Hi
Z = {17, 18, 19, 20, 21, 22, 23, 24, 25} in set-builder notation:
{xZ |x ≥ 17 and x ≤ 25}
Verbally this says:
"the set of all x's that are a member of() the set of Integers(Z),
such that(|) x is greater than or equal to 17 and less than or equal to 25"