Answer
$\frac{x^3}{3}-\frac{1}{9x}+C$
Work Step by Step
$\int\left[x^2+\frac{1}{(3x)^2}\right]dx=\int x^2dx+\int\frac{1}{9x^2}dx=\frac{x^3}{3}-\frac{1}{9x}+C$
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