Using Greens Theorem for Line Integral

By using this method in the link:- https://ibb.co/CJgcF1L ,

Evaluate the Greens theorem with steps ?
The question is in this link : https://ibb.co/1mYNPG9

Do it step by step , on paper or anywhere else you feel comfortable and upload the image , I will be thankful to you , need urgent help
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