2x3−3y2+7xy=0
⟹2×3x2−3×2ydxdy+7(dxdy+y)=0
6x2−6ydxdy+7xdxdy+7y=0⟹dxdy=6x2+7y6y−7x
12x−6(yy′′+y′2)+7(xy′′+y′)+7y′=0
⟹12x−6yy′′−6y′2+7xy′′+7y′+7y′=0
⟹y′′(7x−6y)=6y′2−12x−14y′
⟹y′′=7x−6y6y′2−12x−14y′
⟹y′′=7x−6y6(6x2+7y6y−7x)−12x−14(6x2+7y6y−7x)
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