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(x^5*(21 + 10*x*(7 + 6*x)))/105


Integrate[x^2*(x + 2*x^2)^2, x] ==
(x^5*(21 + 10*x*(7 + 6*x)))/105



           2         2 2
Integrate[x  (x + 2 x ) , x] == 

 5
x  (21 + 10 x (7 + 6 x))
------------------------
          105

Time to compute: < 0.01 second

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