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(E^((a + b)*x)*(-1 + (a + b)*x))/(a + b)^2


Integrate[E^((a + b)*x)*x, x] ==
(E^((a + b)*x)*(-1 + (a + b)*x))/(a + b)^2



           (a + b) x
Integrate[E          x, x] == 

 (a + b) x
E          (-1 + (a + b) x)
---------------------------
                2
         (a + b)

Time to compute: 0.01 second

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