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Y x. Y=x2+2x-1. X^3y'''+x^2y''=1. Y=2+3x-x^3. X2y+1-x2-y.
Y=x2+2x-1. X^3y'''+x^2y''=1. Y=2+3x-x^3. X2y+1-x2-y.

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