# Circle?

Calculus Level pending

$\int_{C} \int_{C}x^{3}y^{2}\, dx\; dy=\, ?$

where $$C$$ is a region, $$x^2+y^2\leq r^2$$, where $$r\in \mathbb R$$.

Notation: $$\mathbb R$$ denotes the set of real numbers.

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