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\[
{} y^{\prime \prime }-2 a y y^{\prime } = 0
\]
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\[
{} y^{\prime \prime }+a y y^{\prime }+b y^{3} = 0
\]
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\[
{} y^{\prime \prime }+a {y^{\prime }}^{2}+b y = 0
\]
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\[
{} y^{\prime \prime }+a {y^{\prime }}^{2}+b y^{\prime }+c y = 0
\]
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\[
{} y^{\prime \prime }+a {y^{\prime }}^{2}+b \sin \left (y\right ) = 0
\]
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\[
{} y^{\prime \prime }+a y^{\prime } {| y^{\prime }|}+b \sin \left (y\right ) = 0
\]
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\[
{} y^{\prime \prime }+a y {y^{\prime }}^{2}+b y = 0
\]
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\[
{} y^{\prime \prime }+a y \left (1+{y^{\prime }}^{2}\right )^{2} = 0
\]
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\[
{} y^{\prime \prime }-a \left (x y^{\prime }-y\right )^{v} = 0
\]
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\[
{} y^{\prime \prime }-k \,x^{a} y^{b} {y^{\prime }}^{r} = 0
\]
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\[
{} y^{\prime \prime } = a \sqrt {1+{y^{\prime }}^{2}}
\]
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\[
{} y^{\prime \prime } = a \sqrt {{y^{\prime }}^{2}+b y^{2}}
\]
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\[
{} y^{\prime \prime } = a \left (1+{y^{\prime }}^{2}\right )^{{3}/{2}}
\]
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\[
{} y^{\prime \prime }-2 a x \left (1+{y^{\prime }}^{2}\right )^{{3}/{2}} = 0
\]
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\[
{} y^{\prime \prime }-a y \left (1+{y^{\prime }}^{2}\right )^{{3}/{2}} = 0
\]
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\[
{} y^{\prime \prime } = 2 a \left (c +b x +y\right ) \left (1+{y^{\prime }}^{2}\right )^{{3}/{2}}
\]
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\[
{} y^{\prime \prime }+y^{3} y^{\prime }-y y^{\prime } \sqrt {y^{4}+4 y^{\prime }} = 0
\]
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\[
{} 8 y^{\prime \prime }+9 {y^{\prime }}^{4} = 0
\]
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\[
{} x y^{\prime \prime }+2 y^{\prime }-x y^{n} = 0
\]
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\[
{} x y^{\prime \prime }+2 y^{\prime }+a \,x^{v} y^{n} = 0
\]
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\[
{} x y^{\prime \prime }+2 y^{\prime }+x \,{\mathrm e}^{y} = 0
\]
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\[
{} x y^{\prime \prime }+a y^{\prime }+b x \,{\mathrm e}^{y} = 0
\]
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\[
{} x y^{\prime \prime }+a y^{\prime }+b \,x^{5-2 a} {\mathrm e}^{y} = 0
\]
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\[
{} x y^{\prime \prime }+\left (-1+y\right ) y^{\prime } = 0
\]
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\[
{} x y^{\prime \prime }-x^{2} {y^{\prime }}^{2}+2 y^{\prime }+y^{2} = 0
\]
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\[
{} 2 x y^{\prime \prime }+{y^{\prime }}^{3}+y^{\prime } = 0
\]
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\[
{} x^{2} y^{\prime \prime } = a \left (y^{n}-y\right )
\]
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\[
{} x^{2} y^{\prime \prime }+a \left ({\mathrm e}^{y}-1\right ) = 0
\]
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\[
{} x^{2} y^{\prime \prime }-\left (2 a +b -1\right ) x y^{\prime }+\left (c^{2} b^{2} x^{2 b}+a \left (a +b \right )\right ) y = 0
\]
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\[
{} x^{2} y^{\prime \prime }-\sqrt {a \,x^{2} {y^{\prime }}^{2}+b y^{2}} = 0
\]
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\[
{} 4 x^{2} y^{\prime \prime }-x^{4} {y^{\prime }}^{2}+4 y = 0
\]
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\[
{} 9 x^{2} y^{\prime \prime }+a y^{3}+2 y = 0
\]
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\[
{} x^{3} y^{\prime \prime }-a \left (x y^{\prime }-y\right )^{2} = 0
\]
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\[
{} x^{4} y^{\prime \prime }+a^{2} y^{n} = 0
\]
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\[
{} x^{4} y^{\prime \prime }-x \left (x^{2}+2 y\right ) y^{\prime }+4 y^{2} = 0
\]
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\[
{} x^{4} y^{\prime \prime }-x^{2} \left (x +y^{\prime }\right ) y^{\prime }+4 y^{2} = 0
\]
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\[
{} x^{4} y^{\prime \prime }+\left (x y^{\prime }-y\right )^{3} = 0
\]
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\[
{} y^{\prime \prime } \sqrt {x}-y^{{3}/{2}} = 0
\]
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\[
{} \left (a \,x^{2}+b x +c \right )^{{3}/{2}} y^{\prime \prime }-F \left (\frac {y}{\sqrt {a \,x^{2}+b x +c}}\right ) = 0
\]
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\[
{} y y^{\prime \prime }+{y^{\prime }}^{2}-y^{\prime } = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}+{\mathrm e}^{x} y \left (c y^{2}+d \right )+{\mathrm e}^{2 x} \left (b +a y^{4}\right ) = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}-y^{2} \ln \left (y\right ) = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}+f \left (x \right ) y^{\prime }-f^{\prime }\left (x \right ) y-y^{3} = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}+f^{\prime }\left (x \right ) y^{\prime }-f^{\prime \prime }\left (x \right ) y+f \left (x \right ) y^{3}-y^{4} = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}+a y y^{\prime }+b y^{2} = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}+a y y^{\prime }-2 y^{2} a +b y^{3} = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}-\left (-1+a y\right ) y^{\prime }+2 a^{2} y^{2}-2 b^{2} y^{3}+a y = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}+\left (-1+a y\right ) y^{\prime }-y \left (y+1\right ) \left (b^{2} y^{2}-a^{2}\right ) = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}+\left (\tan \left (x \right )+\cot \left (x \right )\right ) y y^{\prime }+\left (\cos \left (x \right )^{2}-n^{2} \cot \left (x \right )^{2}\right ) y^{2} \ln \left (y\right ) = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}-f \left (x \right ) y y^{\prime }-g \left (x \right ) y^{2} = 0
\]
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\[
{} y y^{\prime \prime }-{y^{\prime }}^{2}+\left (g \left (x \right )+y^{2} f \left (x \right )\right ) y^{\prime }-y \left (g^{\prime }\left (x \right )-f^{\prime }\left (x \right ) y^{2}\right ) = 0
\]
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\[
{} y y^{\prime \prime }-3 {y^{\prime }}^{2}+3 y y^{\prime }-y^{2} = 0
\]
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\[
{} y y^{\prime \prime }-a {y^{\prime }}^{2} = 0
\]
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\[
{} y y^{\prime \prime }+a \left (1+{y^{\prime }}^{2}\right ) = 0
\]
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\[
{} y y^{\prime \prime }+a {y^{\prime }}^{2}+b y^{3} = 0
\]
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\[
{} y y^{\prime \prime }+a {y^{\prime }}^{2}+b y y^{\prime }+c y^{2}+d y^{1-a} = 0
\]
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\[
{} y y^{\prime \prime }+a {y^{\prime }}^{2}+b y^{2} y^{\prime }+c y^{4} = 0
\]
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\[
{} y y^{\prime \prime }-\frac {\left (a -1\right ) {y^{\prime }}^{2}}{a}-f \left (x \right ) y^{2} y^{\prime }+\frac {a f \left (x \right )^{2} y^{4}}{\left (2+a \right )^{2}}-\frac {a f^{\prime }\left (x \right ) y^{3}}{2+a} = 0
\]
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\[
{} y^{\prime \prime } \left (x +y\right )+{y^{\prime }}^{2}-y^{\prime } = 0
\]
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\[
{} y^{\prime \prime } \left (x -y\right )+2 y^{\prime } \left (y^{\prime }+1\right ) = 0
\]
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\[
{} y^{\prime \prime } \left (x -y\right )-\left (y^{\prime }+1\right ) \left (1+{y^{\prime }}^{2}\right ) = 0
\]
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\[
{} y^{\prime \prime } \left (x -y\right )-h \left (y^{\prime }\right ) = 0
\]
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\[
{} 2 y y^{\prime \prime }-{y^{\prime }}^{2}-8 y^{3} = 0
\]
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\[
{} 2 y y^{\prime \prime }-{y^{\prime }}^{2}-8 y^{3}-4 y^{2} = 0
\]
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\[
{} 2 y y^{\prime \prime }-{y^{\prime }}^{2}-4 \left (x +2 y\right ) y^{2} = 0
\]
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\[
{} 2 y y^{\prime \prime }-{y^{\prime }}^{2}+\left (a y+b \right ) y^{2} = 0
\]
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\[
{} 2 y y^{\prime \prime }-{y^{\prime }}^{2}+\left (b x +a y\right ) y^{2} = 0
\]
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\[
{} 2 y y^{\prime \prime }-{y^{\prime }}^{2}-3 y^{4} = 0
\]
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\[
{} 2 y y^{\prime \prime }-3 {y^{\prime }}^{2} = 0
\]
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\[
{} 2 y y^{\prime \prime }-3 {y^{\prime }}^{2}-4 y^{2} = 0
\]
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\[
{} 2 y y^{\prime \prime }-3 {y^{\prime }}^{2}+y^{2} f \left (x \right ) = 0
\]
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\[
{} 2 y y^{\prime \prime }-6 {y^{\prime }}^{2}+\left (1+a y^{3}\right ) y^{2} = 0
\]
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\[
{} 2 y y^{\prime \prime }-{y^{\prime }}^{2} \left (1+{y^{\prime }}^{2}\right ) = 0
\]
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\[
{} 3 y y^{\prime \prime }-5 {y^{\prime }}^{2} = 0
\]
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\[
{} 4 y y^{\prime \prime }-3 {y^{\prime }}^{2}+4 y = 0
\]
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\[
{} 4 y y^{\prime \prime }-3 {y^{\prime }}^{2}-12 y^{3} = 0
\]
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\[
{} 4 y y^{\prime \prime }-3 {y^{\prime }}^{2}+a y^{3}+b y^{2}+c y = 0
\]
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\[
{} 4 y y^{\prime \prime }-5 {y^{\prime }}^{2}+y^{2} a = 0
\]
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\[
{} 12 y y^{\prime \prime }-15 {y^{\prime }}^{2}+8 y^{3} = 0
\]
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\[
{} n y y^{\prime \prime }-\left (n -1\right ) {y^{\prime }}^{2} = 0
\]
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\[
{} a y y^{\prime \prime }+b {y^{\prime }}^{2}-\frac {y y^{\prime }}{\sqrt {c^{2}+x^{2}}} = 0
\]
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\[
{} \left (a y+b \right ) y^{\prime \prime }+c {y^{\prime }}^{2} = 0
\]
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\[
{} x y y^{\prime \prime }+x {y^{\prime }}^{2}-y y^{\prime } = 0
\]
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\[
{} x y y^{\prime \prime }-x {y^{\prime }}^{2}+y y^{\prime }+x \left (d +a y^{4}\right )+y \left (c +b y^{2}\right ) = 0
\]
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\[
{} x y y^{\prime \prime }-x {y^{\prime }}^{2}+a y y^{\prime }+b x y^{3} = 0
\]
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\[
{} x y y^{\prime \prime }+2 x {y^{\prime }}^{2}+a y y^{\prime } = 0
\]
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\[
{} x y y^{\prime \prime }-2 x {y^{\prime }}^{2}+\left (y+1\right ) y^{\prime } = 0
\]
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\[
{} x y y^{\prime \prime }-2 x {y^{\prime }}^{2}+a y y^{\prime } = 0
\]
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\[
{} x y y^{\prime \prime }-4 x {y^{\prime }}^{2}+4 y y^{\prime } = 0
\]
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\[
{} x y y^{\prime \prime }+\left (\frac {a x}{\sqrt {b^{2}-x^{2}}}-x \right ) {y^{\prime }}^{2}-y y^{\prime } = 0
\]
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\[
{} x \left (x +y\right ) y^{\prime \prime }+x {y^{\prime }}^{2}+\left (x -y\right ) y^{\prime }-y = 0
\]
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\[
{} 2 x y y^{\prime \prime }-x {y^{\prime }}^{2}+y y^{\prime } = 0
\]
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\[
{} x^{2} \left (-1+y\right ) y^{\prime \prime }-2 x^{2} {y^{\prime }}^{2}-2 x \left (-1+y\right ) y^{\prime }-2 y \left (-1+y\right )^{2} = 0
\]
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\[
{} x^{2} \left (x +y\right ) y^{\prime \prime }-\left (x y^{\prime }-y\right )^{2} = 0
\]
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\[
{} x^{2} \left (x -y\right ) y^{\prime \prime }+a \left (x y^{\prime }-y\right )^{2} = 0
\]
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\[
{} 2 x^{2} y y^{\prime \prime }-x^{2} \left (1+{y^{\prime }}^{2}\right )+y^{2} = 0
\]
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\[
{} a \,x^{2} y y^{\prime \prime }+b \,x^{2} {y^{\prime }}^{2}+c x y y^{\prime }+d y^{2} = 0
\]
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\[
{} x \left (1+x \right )^{2} y y^{\prime \prime }-x \left (1+x \right )^{2} {y^{\prime }}^{2}+2 \left (1+x \right )^{2} y y^{\prime }-a \left (x +2\right ) y^{2} = 0
\]
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\[
{} 8 \left (-x^{3}+1\right ) y y^{\prime \prime }-4 \left (-x^{3}+1\right ) {y^{\prime }}^{2}-12 x^{2} y y^{\prime }+3 x y^{2} = 0
\]
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\[
{} \left (1+y^{2}\right ) y^{\prime \prime }+\left (1-2 y\right ) {y^{\prime }}^{2} = 0
\]
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