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Refactor Code Snippet
Optimize and clean up a specific piece of code for better readability.
📝 प्रॉम्ट सामग्री
Analyze the following Python code snippet. Refactor it to improve readability, efficiency, and adherence to PEP8 standards. Explain the changes you made and why. Code: def calc(x,y): return x*y+x*y-y