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Question: IntTutor says unable to solve this problem

Question:IntTutor says unable to solve this problem

ferago42 40 Maple 2019
integration inttutor
September 07 2019
5

Hi, I ran the following command: 

int(x^2 * sqrt(1-x^2), x)

and I got a solution. Then I try IntTutor: 

IntTutor(x^2 * sqrt(1-x^2), x)

And a UI window popus, does nothing. When I click "All Steps" it says "Unable to solve this problem". How so, if int() just gave me an answer? Or am I using the commands wrong?

I'm trying to see the steps by step solution of the integral, so I can compare it with my attempts. Kinda like what http://integral-calculator.com/ does. Thanks in advance. 
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