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| Dear Udo, thanks for your comments. But if you try (I am using Mathematica 9) In[1]:= sol = Integrate[1/Sqrt[2 y^3 + 1], y] Out[1]= (1/(3^(1/4) Sqrt[1 + 2 y^3]))(-1)^(1/6) 2^( 2/3) Sqrt[(-1)^(5/6) (-1 + (-2)^(1/3) y)] Sqrt[ 1 +... |