Question: Maple 2017 cannot handle the integral of the Kronecker delta function

Dear Sirs,

I would very much appreciate if you could help me sorting out the attached problem that Maple 2017 is giving a wrong result.

Y s.

My code:

I want to define the Kronecker delta function and compute its integral that is 1, but Maple guives 0 that is a wrong answer.
I would very much appreciate if you could help me sorting out this problem.

My e-mail: a3portela@gmail.com 

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