# Eat green vegetables. They are healthy

Calculus Level 4

$\oint _{ c }^{ }{ \left ( \cos (x) \sin(y)-xy \right ) \ dx+\left ( \sin(x)\cos(y) \right ) } \ dy$

Evaluate the integral above where $$c$$ denotes the circle $${ x }^{ 2 }{ +y }^{ 2 }=1$$

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