I thought it is (e^x)^2 with u = e^x(adsbygoogle = window.adsbygoogle || []).push({});

so it should be u^2 but he get only u without a square. Can anyone here explain it.

The red box.

http://img6.imageshack.us/img6/3272/whatj.png [Broken]

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# Can anyone here explain how did he get it.

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