aija
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This is part of an example solution to a problem about integrating a function in a [0,1]x[0,1]x[0,1] cube. I just don't understand how the midst function is integrated like in the attached picture. This is the same integral in wolfram alpha and it gives a different solution:
http://www.wolframalpha.com/input/?i=intg((yz^2)*e^(-xyz))
http://www.wolframalpha.com/input/?i=intg((yz^2)*e^(-xyz))