Question: How do I solve this question in maple?

Assuming that all the necessary derivatives exist and are continuous, show that if

f(x,y) satisfies Laplace equation    ∂2f/∂x2+∂2f/∂y2= 0,  

 

then

 

IntegralC((∂f/∂y)dx−(∂f/∂x)dy= 0

 

for all closed curves C to which Green’s theorem applies.

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