The difference between the two sets is the complement of the set. That means that the compliment set will include the numbers that the two sets do not have. For the first universal set U, we have numbers between -3 up to 10. The second set contains numbers -2 up to 4 only. Why up to 4 only? Because the inequality states that 5 is not included on the number set.
This means that the numbers that include the complement of the set are -3, 5, 6, 7, 8, 9, and 10.
Answer: (-3, 5, 6, 7, 8, 9, 10)