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Answer:
5x³+y³-4x-y
Explanation:
x³ -2y³+x. +. y³-2x²+y. + -2y+2y³-5x+4x³
x³-y³+x+y + -2y+2y³-5x+4x³
xy³−x³−2y³+y for the first one and 4x³+2y³−5x−2y for the second