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Question: how to check if int() was successful?

Question:how to check if int() was successful?

nm 8552
integral unevaluated
December 25 2014
1

In Maple help on int, it says

"If Maple cannot find a closed form expression for the integral, the function call itself is returned"

But then, what is the correct way to check for this in the code? How do I know that the result returned is the call I made? (it would have been easier if these functions throw an error, or set some status code that one can check for success or failure).
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