Photos 2 DX DY

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2 dx dy. Dy=2-x^3dx. Dy/DX =4x. X^2dy=(y^2+XY)DX. DX/dy - 2xy = 4x^3.
Dy=2-x^3dx. Dy/DX =4x. X^2dy=(y^2+XY)DX. DX/dy - 2xy = 4x^3.

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