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\[
{} y^{\prime \prime }+y^{\prime }+a \,{\mathrm e}^{-2 x} y = 0
\]
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\[
{} y^{\prime \prime }-y^{\prime }+y \,{\mathrm e}^{2 x} = 0
\]
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\[
{} y^{\prime \prime }+a y^{\prime }-\left (b^{2} x^{2}+c \right ) y = 0
\]
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\[
{} y^{\prime \prime }+2 a y^{\prime }+f \left (x \right ) y = 0
\]
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\[
{} y^{\prime \prime }+x y^{\prime }+y = 0
\]
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\[
{} y^{\prime \prime }+x y^{\prime }-y = 0
\]
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\[
{} y^{\prime \prime }+x y^{\prime }+\left (n +1\right ) y = 0
\]
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\[
{} y^{\prime \prime }+x y^{\prime }-n y = 0
\]
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\[
{} y^{\prime \prime }-x y^{\prime }+2 y = 0
\]
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\[
{} y^{\prime \prime }-x y^{\prime }-a y = 0
\]
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\[
{} y^{\prime \prime }-x y^{\prime }+\left (x -1\right ) y = 0
\]
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\[
{} y^{\prime \prime }-2 x y^{\prime }+a y = 0
\]
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\[
{} y^{\prime \prime }+4 x y^{\prime }+\left (4 x^{2}+2\right ) y = 0
\]
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\[
{} y^{\prime \prime }-4 x y^{\prime }+\left (3 x^{2}+2 n -1\right ) y = 0
\]
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\[
{} y^{\prime \prime }-4 x y^{\prime }+\left (4 x^{2}-1\right ) y-{\mathrm e}^{x} = 0
\]
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\[
{} y^{\prime \prime }-4 x y^{\prime }+\left (4 x^{2}-2\right ) y = 0
\]
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\[
{} y^{\prime \prime }-4 x y^{\prime }+\left (4 x^{2}-3\right ) y-{\mathrm e}^{x^{2}} = 0
\]
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\[
{} y^{\prime \prime }+a x y^{\prime }+b y = 0
\]
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\[
{} y^{\prime \prime }+2 a x y^{\prime }+a^{2} x^{2} y = 0
\]
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\[
{} y^{\prime \prime }+\left (a x +b \right ) y^{\prime }+\left (c x +d \right ) y = 0
\]
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\[
{} y^{\prime \prime }+\left (a x +b \right ) y^{\prime }+\left (\operatorname {a1} \,x^{2}+\operatorname {b1} x +\operatorname {c1} \right ) y = 0
\]
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\[
{} y^{\prime \prime }-y^{\prime } x^{2}+x y = 0
\]
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\[
{} y^{\prime \prime }-y^{\prime } x^{2}-\left (1+x \right )^{2} y = 0
\]
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\[
{} y^{\prime \prime }-x^{2} \left (1+x \right ) y^{\prime }+x \left (x^{4}-2\right ) y = 0
\]
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\[
{} y^{\prime \prime }+x^{4} y^{\prime }-x^{3} y = 0
\]
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\[
{} y^{\prime \prime }+a \,x^{q -1} y^{\prime }+b \,x^{q -2} y = 0
\]
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\[
{} y^{\prime \prime }+\sqrt {x}\, y^{\prime }+\left (\frac {1}{4 \sqrt {x}}+\frac {x}{4}-9\right ) y-x \,{\mathrm e}^{-\frac {x^{{3}/{2}}}{3}} = 0
\]
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\[
{} y^{\prime \prime }-\frac {y^{\prime }}{\sqrt {x}}+\frac {\left (x +\sqrt {x}-8\right ) y}{4 x^{2}} = 0
\]
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\[
{} y^{\prime \prime }-\left (2 \,{\mathrm e}^{x}+1\right ) y^{\prime }+y \,{\mathrm e}^{2 x}-{\mathrm e}^{3 x} = 0
\]
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\[
{} y^{\prime \prime }+2 n y^{\prime } \cot \left (x \right )+\left (-a^{2}+n^{2}\right ) y = 0
\]
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\[
{} y^{\prime \prime }+\tan \left (x \right ) y^{\prime }+y \cos \left (x \right )^{2} = 0
\]
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\[
{} y^{\prime \prime }+\tan \left (x \right ) y^{\prime }-y \cos \left (x \right )^{2} = 0
\]
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\[
{} y^{\prime \prime }+\cot \left (x \right ) y^{\prime }+v \left (v +1\right ) y = 0
\]
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\[
{} y^{\prime \prime }-\cot \left (x \right ) y^{\prime }+y \sin \left (x \right )^{2} = 0
\]
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\[
{} y^{\prime \prime }+a y^{\prime } \tan \left (x \right )+b y = 0
\]
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\[
{} y^{\prime \prime }+2 a y^{\prime } \cot \left (a x \right )+\left (-a^{2}+b^{2}\right ) y = 0
\]
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\[
{} y^{\prime \prime }+f \left (x \right ) y^{\prime }+\left (\frac {f \left (x \right )^{2}}{4}+\frac {f^{\prime }\left (x \right )}{2}+a \right ) y = 0
\]
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\[
{} y^{\prime \prime }-\frac {a f^{\prime }\left (x \right ) y^{\prime }}{f \left (x \right )}+b f \left (x \right )^{2 a} y = 0
\]
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\[
{} y^{\prime \prime }-\left (\frac {f^{\prime }\left (x \right )}{f \left (x \right )}+2 a \right ) y^{\prime }+\left (\frac {a f^{\prime }\left (x \right )}{f \left (x \right )}+a^{2}-b^{2} f \left (x \right )^{2}\right ) y = 0
\]
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\[
{} y^{\prime \prime }-\left (\frac {2 f^{\prime }\left (x \right )}{f \left (x \right )}+\frac {g^{\prime \prime }\left (x \right )}{g^{\prime }\left (x \right )}-\frac {g^{\prime }\left (x \right )}{g \left (x \right )}\right ) y^{\prime }+\left (\frac {f^{\prime }\left (x \right ) \left (\frac {2 f^{\prime }\left (x \right )}{f \left (x \right )}+\frac {g^{\prime \prime }\left (x \right )}{g^{\prime }\left (x \right )}-\frac {g^{\prime }\left (x \right )}{g \left (x \right )}\right )}{f \left (x \right )}-\frac {f^{\prime \prime }\left (x \right )}{f \left (x \right )}-\frac {v^{2} {g^{\prime }\left (x \right )}^{2}}{g \left (x \right )^{2}}+{g^{\prime }\left (x \right )}^{2}\right ) y = 0
\]
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\[
{} y^{\prime \prime }-\left (\frac {g^{\prime \prime }\left (x \right )}{g^{\prime }\left (x \right )}+\frac {\left (2 v -1\right ) g^{\prime }\left (x \right )}{g \left (x \right )}+\frac {2 h^{\prime }\left (x \right )}{h \left (x \right )}\right ) y^{\prime }+\left (\frac {h^{\prime }\left (x \right ) \left (\frac {g^{\prime \prime }\left (x \right )}{g^{\prime }\left (x \right )}+\frac {\left (2 v -1\right ) g^{\prime }\left (x \right )}{g \left (x \right )}+\frac {2 h^{\prime }\left (x \right )}{h \left (x \right )}\right )}{h \left (x \right )}-\frac {h^{\prime \prime }\left (x \right )}{h \left (x \right )}+{g^{\prime }\left (x \right )}^{2}\right ) y = 0
\]
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\[
{} 4 y^{\prime \prime }-\left (x^{2}+a \right ) y = 0
\]
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\[
{} 4 y^{\prime \prime }+4 \tan \left (x \right ) y^{\prime }-\left (5 \tan \left (x \right )^{2}+2\right ) y = 0
\]
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\[
{} a y^{\prime \prime }-\left (a b +c +x \right ) y^{\prime }+\left (b \left (x +c \right )+d \right ) y = 0
\]
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\[
{} a^{2} y^{\prime \prime }+a \left (a^{2}-2 b \,{\mathrm e}^{-a x}\right ) y^{\prime }+b^{2} {\mathrm e}^{-2 a x} y = 0
\]
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\[
{} x \left (y^{\prime \prime }+y\right )-\cos \left (x \right ) = 0
\]
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\[
{} x y^{\prime \prime }+\left (x +a \right ) y = 0
\]
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\[
{} x y^{\prime \prime }+y^{\prime }+\left (x +a \right ) y = 0
\]
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\[
{} x y^{\prime \prime }-y^{\prime }+x^{3} \left ({\mathrm e}^{x^{2}}-v^{2}\right ) y = 0
\]
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\[
{} x y^{\prime \prime }+2 y^{\prime }-x y-{\mathrm e}^{x} = 0
\]
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\[
{} x y^{\prime \prime }+v y^{\prime }+a y = 0
\]
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\[
{} x y^{\prime \prime }+a y^{\prime }+b x y = 0
\]
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\[
{} x y^{\prime \prime }+a y^{\prime }+b \,x^{\operatorname {a1}} y = 0
\]
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\[
{} x y^{\prime \prime }+\left (x +b \right ) y^{\prime }+a y = 0
\]
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\[
{} x y^{\prime \prime }+\left (x +a +b \right ) y^{\prime }+a y = 0
\]
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\[
{} x y^{\prime \prime }-x y^{\prime }-y-x \left (1+x \right ) {\mathrm e}^{x} = 0
\]
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\[
{} x y^{\prime \prime }-x y^{\prime }-a y = 0
\]
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\[
{} x y^{\prime \prime }-\left (1+x \right ) y^{\prime }+y = 0
\]
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\[
{} x y^{\prime \prime }-\left (1+x \right ) y^{\prime }-2 \left (x -1\right ) y = 0
\]
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\[
{} x y^{\prime \prime }+\left (-x +b \right ) y^{\prime }-a y = 0
\]
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\[
{} x y^{\prime \prime }-2 \left (x -1\right ) y^{\prime }-y = 0
\]
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\[
{} x y^{\prime \prime }-\left (3 x -2\right ) y^{\prime }-\left (2 x -3\right ) y = 0
\]
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\[
{} x y^{\prime \prime }+\left (a x +b +n \right ) y^{\prime }+n a y = 0
\]
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\[
{} x y^{\prime \prime }-\left (a +b \right ) \left (1+x \right ) y^{\prime }+a b x y = 0
\]
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\[
{} x y^{\prime \prime }+\left (x \left (a +b \right )+m +n \right ) y^{\prime }+\left (a b x +a n +b m \right ) y = 0
\]
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\[
{} x y^{\prime \prime }-2 \left (a x +b \right ) y^{\prime }+\left (a^{2} x +2 a b \right ) y = 0
\]
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\[
{} x y^{\prime \prime }+\left (a x +b \right ) y^{\prime }+\left (c x +d \right ) y = 0
\]
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\[
{} x y^{\prime \prime }-\left (x^{2}-x \right ) y^{\prime }+\left (x -1\right ) y = 0
\]
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\[
{} x y^{\prime \prime }-\left (x^{2}-x -2\right ) y^{\prime }-x \left (x +3\right ) y = 0
\]
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\[
{} x y^{\prime \prime }-\left (2 a \,x^{2}+1\right ) y^{\prime }+b \,x^{3} y = 0
\]
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\[
{} x y^{\prime \prime }-2 \left (x^{2}-a \right ) y^{\prime }+2 n x y = 0
\]
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\[
{} x y^{\prime \prime }+\left (4 x^{2}-1\right ) y^{\prime }-4 x^{3} y-4 x^{5} = 0
\]
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\[
{} x y^{\prime \prime }+\left (2 a \,x^{3}-1\right ) y^{\prime }+\left (a^{2} x^{3}+a \right ) x^{2} y = 0
\]
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\[
{} x y^{\prime \prime }+\left (2 a x \ln \left (x \right )+1\right ) y^{\prime }+\left (a^{2} x \ln \left (x \right )^{2}+a \ln \left (x \right )+a \right ) y = 0
\]
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\[
{} x y^{\prime \prime }+\left (f \left (x \right ) x +2\right ) y^{\prime }+f \left (x \right ) y = 0
\]
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\[
{} \left (x -3\right ) y^{\prime \prime }-\left (4 x -9\right ) y^{\prime }+\left (3 x -6\right ) y = 0
\]
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\[
{} 2 x y^{\prime \prime }-\left (x -1\right ) y^{\prime }+a y = 0
\]
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\[
{} 2 x y^{\prime \prime }-\left (2 x -1\right ) y^{\prime }+a y = 0
\]
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\[
{} \left (2 x -1\right ) y^{\prime \prime }-\left (3 x -4\right ) y^{\prime }+\left (x -3\right ) y = 0
\]
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\[
{} 4 x y^{\prime \prime }-\left (x +a \right ) y = 0
\]
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\[
{} 4 x y^{\prime \prime }+4 y^{\prime }-\left (x +2\right ) y = 0
\]
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\[
{} 4 x y^{\prime \prime }+4 y-\left (x +2\right ) y+l y = 0
\]
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\[
{} 4 x y^{\prime \prime }+4 m y^{\prime }-\left (x -2 m -4 n \right ) y = 0
\]
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\[
{} 16 x y^{\prime \prime }+8 y^{\prime }-\left (x +a \right ) y = 0
\]
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\[
{} a x y^{\prime \prime }+b y^{\prime }+c y = 0
\]
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\[
{} a x y^{\prime \prime }+\left (b x +3 a \right ) y^{\prime }+3 b y = 0
\]
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\[
{} 5 \left (a x +b \right ) y^{\prime \prime }+8 a y^{\prime }+c \left (a x +b \right )^{{1}/{5}} y = 0
\]
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\[
{} 2 a x y^{\prime \prime }+\left (b x +a \right ) y^{\prime }+c y = 0
\]
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\[
{} 2 a x y^{\prime \prime }+\left (b x +3 a \right ) y^{\prime }+c y = 0
\]
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\[
{} \left (\operatorname {a2} x +\operatorname {b2} \right ) y^{\prime \prime }+\left (\operatorname {a1} x +\operatorname {b1} \right ) y^{\prime }+\left (\operatorname {a0} x +\operatorname {b0} \right ) y = 0
\]
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\[
{} x^{2} y^{\prime \prime }+\left (a \,x^{2}+b x +c \right ) y = 0
\]
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\[
{} x^{2} y^{\prime \prime }+\frac {y}{\ln \left (x \right )}-x \,{\mathrm e}^{x} \left (2+x \ln \left (x \right )\right ) = 0
\]
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\[
{} x^{2} y^{\prime \prime }+a y^{\prime }-x y = 0
\]
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\[
{} x^{2} y^{\prime \prime }+a y^{\prime }-\left (b^{2} x^{2}+a b \right ) y = 0
\]
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\[
{} x^{2} y^{\prime \prime }+x y^{\prime }+\left (-v^{2}+x^{2}\right ) y-f \left (x \right ) = 0
\]
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\[
{} x^{2} y^{\prime \prime }+\left (x +a \right ) y^{\prime }-y = 0
\]
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\[
{} x^{2} y^{\prime \prime }+2 x y^{\prime }+\left (l \,x^{2}+a x -n \left (n +1\right )\right ) y = 0
\]
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\[
{} x^{2} y^{\prime \prime }+2 \left (x -1\right ) y^{\prime }+a y = 0
\]
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\[
{} x^{2} y^{\prime \prime }+2 \left (x +a \right ) y^{\prime }-b \left (b -1\right ) y = 0
\]
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\[
{} x^{2} y^{\prime \prime }-2 x y^{\prime }+\left (x^{2}+2\right ) y-\frac {x^{2}}{\cos \left (x \right )} = 0
\]
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