Let `f(x)=int _( z )^(2) (dy)/(sqrt(1+ y ^(3))).` The value of the integral `int _(0)^(2) xf (x ) dx` is equal to:

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Let f(x)=int _( x )^(2) (dy)/(sqrt(1+ y ^(3))). The value of the integral int _(0)^(2) xf (x ) dx is equal to:

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