M is the set of integers that are greater than -1 less than 4
The set M can be represented in set-builder notation as:
M = {x ∈ ℤ | -1 < x < 4}
This means that M is the set of integers x such that x is greater than -1 and less than 4. In other words, M is the set of integers -1, 0, 1, 2, and 3.