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-(x^(1 + n)*ExpIntegralE[-n, -(a*x)])


Integrate[E^(a*x)*x^n, x] ==
-(x^(1 + n)*ExpIntegralE[-n, -(a*x)])



           a x  n
Integrate[E    x , x] == 

   1 + n
-(x      ExpIntegralE[-n, -(a x)])

Time to compute: 0.01 second

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