How can the general form of this integral be determined?

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The discussion centers on determining the general form of the integral \(\int f^{5}(f_{x}+2f_{y})\). The participants highlight the challenge of integrating with respect to multiple variables, specifically \(x\) and \(y\), and the complication introduced by the constant factor of 2. The consensus is that clarity on the integration variable is crucial for meaningful interpretation of the integral.

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somethingstra
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Say you have an arbitrary function f(x,y) and you have the partial derivative fx

How would you go about finding the general form of this integral?

\int f^{5}(f_{x}+2f_{y})

I wanted to treat fx+fy = df, but the constant 2 really messes that up.
 
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with respect to which variable are you integrating? x,y?
 
Yes... as the integral is written, I'm not sure it means much.
 

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