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It's in the substitution rule/symmetric function section of my book, so I figure I probably have to use one of those techniques to solve it. I've tried doing a bunch of different u substitutions [itex]\sqrt{x}[/itex], [itex]e^{{\sqrt{x}}}[/itex], etc, but none of them seem right.

How can you tell if a function is symmetric by looking at the equation? And whether it is even or odd?

PS - couldn't figure out how to do it, but it's actually a definite integral that goes from 1 to 4. Also, if the top of the fraction is hard to read, it's [itex]e^{{\sqrt{x}}}[/itex].