First, we need to evaluate the inner integral with respect to x:
$\int 2yxy \, dx = \int 2y^2x \, dx = y^2x^2 + C(y)$
Now, we need to evaluate the outer integral with respect to y:
$\int (y^2x^2 + C(y)) \, dy = \int y^2x^2 \, dy + \int C(y) \, dy$
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