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Dx y. (X + Y -2)DX + (X-Y+4)dy =0. (2x+y+1)DX-(4x+2y-3)dy=0. 2x(x^2+y)DX=dy. X^2dx=3x^2dy.
(X + Y -2)DX + (X-Y+4)dy =0. (2x+y+1)DX-(4x+2y-3)dy=0. 2x(x^2+y)DX=dy. X^2dx=3x^2dy.

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