Evaluate the line integral with the given closed curve

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Evaluate the line integral of the closed curve C oriented counterclockwise

Evaluate the line integral of the closed curve C oriented counterclockwise

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Hint: Applying Green's Theorem

$ \int_C (Pdx + Qdy) = \iint_D (\frac{\partial Q}{\partial x} - \frac{\partial P}{\partial x}) dA$

When you find $\frac{\partial Q}{\partial x} - \frac{\partial P}{\partial x}$, you will realize you get a number and your integral is that number multiplied by $\iint_D dA$. So simply calculate the area of the given closed path splitting into rectangles and squares, without integral. That should lead you to the answer.