1. The problem is to simplify the expression "Simple" which appears to be a request for a simple explanation or simplification. 2. Since no specific mathematical expression or problem is given, we interpret "Simple" as a request for a straightforward or basic explanation. 3. Without additional context or a specific problem, there is no mathematical operation to perform. 4. If you have a specific math problem or expression you want simplified, please provide it. Final answer: The input "Simple" does not contain a mathematical problem to solve or simplify.