Unexpected result for definite integral

Question:Unexpected result for definite integral

Posted: Peter Harmand 26 Product: Maple 14

January 23 2012

I expected

int(x^(-13/10), x):
eval(%,x=1000)-eval(%,x=1/1000);

$-(1/300)*1000^(7/10)+(10/3)*1000^(3/10)$

but i get

int(x^(-13/10), x=1/1000..1000);

$(1/30)*10^(9/10)*sin((3/10)*Pi)*(100*sec((1/5)*Pi)-csc((3/10)*Pi)*10^(1/5))$

Can somebody explain why?

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