explain this question in full method
x² - y² + 8xy² – 3y² + 15xy² + 2x² + y2 - x²
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Answer:
x²+2x²-x²-y²-3y²+y²+8xy²+15xy²
(x²+2x²-x²)-(y²-3y²+y²)+(8xy²+15xy²)
(3x²-x²)-(2y²+y²)+(23xy²)
(2x²)-(3y²)+(23xy²)
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