Add the following:
1) 2x²y - 3xy³+ 6x²y² - 4,2x²y² - 4xy² - 7+ 2x³y and - 7xy² + 8
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Step-by-step explanation:
2x²y-3xy³+6x²y²-4+2x²y²-4xy²-7+2x³y-7xy²+8
2x²y-3xy³+8x²y²-11xy²+2x³y-3
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