Photos X Y DX

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X y dx. Dy=2-x^3dx. (X^3+2y^3)(DX-dy). Dy/DX+2y/x=x^3. (2x +1)*dy/DX = 4x + 2y.
Dy=2-x^3dx. (X^3+2y^3)(DX-dy). Dy/DX+2y/x=x^3. (2x +1)*dy/DX = 4x + 2y.

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