7. The general solution of the differential equation x^2 dx - (y+1) dy = 0 is O zy^2 + 3y - 6x^3 = C 2y^2 - 6y + 3x^3 = C O 3y^2 - by - 2x^3 = C O 3y^2- 6y + 2x^3 = c

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