2-5

Could you clarify what you mean by "2-5"? It could be several things. Here are the common possibilities with quick answers:

• Arithmetic subtraction: 2 − 5 = −3
• Interval notation: [2, 5] represents all real numbers x with 2 ≤ x ≤ 5
• Integer set from 2 to 5: {2, 3, 4, 5}
• Exercises 2–5 in a workbook or exam: please paste the problem texts or describe the topics, and I’ll solve them step by step

If you share the exact context (math topic, textbook, or the problems themselves), I’ll tailor the solution.