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Dx y. D 2y/DX 2 -dy/DX=0. X^2dy=y^2dx. 2(E^X-Y) DX=dy. Y''-2y'=2e^x.
D 2y/DX 2 -dy/DX=0. X^2dy=y^2dx. 2(E^X-Y) DX=dy. Y''-2y'=2e^x.

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