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6x y x 3y. X^3*Y''+X^2*Y'=1. Y=X^3+3x^2. Y=x2+3x. Y=X^3/X^2-1.
X^3*Y''+X^2*Y'=1. Y=X^3+3x^2. Y=x2+3x. Y=X^3/X^2-1.

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