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(3*t*x)/(3 + t^2)^(1/3)

Integrate[(3*t)/(3 + t^2)^(1/3), x] ==
(3*t*x)/(3 + t^2)^(1/3) 

              3 t
Integrate[-----------, x] == 
                2 1/3
          (3 + t )

   3 t x
-----------
      2 1/3
(3 + t )
Time to compute: < 0.01 second
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