Posted by Anonymous on Wednesday, December 14, 2011 at 9:08pm.
When the exponential function is multiplied by a factor which is the derivative of the exponent:
d/dx x^3 = 2x^2, then
the integral is simply the exponential function, with some constants to be adjusted.
If you are not sure, try differentiating
e^(x^3) and you'll get the picture.
It will save you a lot of time, let say if you try to integrate by parts:
x^99 * e^(x^100) !
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