Question: How can I restore default configuration?

Hello, I am new with Maple. I am using because I am taking a course in my college where I need it. I have the following problem: How it can be seen in image, code is not been adecuatelly executed, because I need numerical values at output. I think this problem is because a configuration issue, but I am not sure.

How can I restore default configuration in order to try a solution for this issue?

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