$$y^{\prime \prime }+5y^{\prime }+4y=0$$

$$y^{\prime \prime }-2y^{\prime }+5y=0$$

$$y^{\prime \prime }+2y^{\prime }+y=0$$

$$y^{\prime \prime }-6y^{\prime }+13y=0$$

$$2y^{\prime \prime }+20y^{\prime }+51y=0$$

$$y^{\prime \prime }+2y^{\prime }+y=0$$

$$y^{\prime \prime }+8y^{\prime }+20y=0$$

$$y^{\prime \prime }+2y^{\prime }+10y=0$$

$$y^{\prime \prime }+{\beta }^{2}y=0$$

$$y^{\prime \prime }+2y^{\prime }+y=0$$

$$5y^{\prime \prime }+2y^{\prime }+4y=0$$

$$y^{\prime \prime }=0$$

$$y{y}^{\prime \prime }=0$$

$$y^2{y}^{\prime \prime }=0$$

$$ay{y}^{\prime \prime }+by=0$$

$$y^{\prime \prime }+y^{\prime }+y=0$$

$$y^{\prime \prime }+y^{\prime }+y=0$$

$$y^{\prime \prime }+y^{\prime }+y=0$$

$$y^{\prime \prime }+c{y}^{\prime }+ky=0$$

$$y^{\prime \prime }=0$$

$${y^{\prime \prime }}^2=0$$

$${y^{\prime \prime }}^n=0$$

$$a{y}^{\prime \prime }=0$$

$$a{y^{\prime \prime }}^2=0$$

$$a{y^{\prime \prime }}^n=0$$

$${y^{\prime \prime }}^3=0$$

$$y^{\prime \prime }+y^{\prime }=0$$

$$y^{\prime \prime }+y^{\prime }+y=0$$

$$y^{\prime \prime }-y^{\prime }+y=0$$

$$y^{\prime \prime }+3y^{\prime }+4y=0$$

$$u^{\prime \prime }+2u^{\prime }+u=0$$

$$y^{\prime \prime }=0$$

$$y^{\prime \prime }=0$$

$$y^{\prime \prime }+y=0$$

$$y^{\prime \prime }-y=0$$

$$y^{\prime \prime }+ly=0$$

$$y^{\prime \prime }+a{y}^{\prime }+by=0$$

$$y^{\prime \prime }+ay=0$$

$$y^{\prime \prime }+a{y}^{\prime }+by=0$$

$$y^{\prime \prime }-3y^{\prime }+2y=0$$

$$y^{\prime \prime }-6y^{\prime }+25y=0$$

$$x^{\prime \prime }+2x^{\prime }+2x=0$$

$$2x^{\prime \prime }-5x^{\prime }-3x=0$$

$$x^{\prime \prime }-4x^{\prime }+4x=0$$

$$x^{\prime \prime }-2x^{\prime }=0$$

$$\frac{x^{\prime \prime }}{2}+x^{\prime }+\frac{x}{2}=0$$

$$x^{\prime \prime }+4x^{\prime }+3x=0$$

$$x^{\prime \prime }-4x^{\prime }+4x=0$$

$$x^{\prime \prime }-2x^{\prime }=0$$

$$\frac{x^{\prime \prime }}{2}+x^{\prime }+\frac{x}{2}=0$$

$$x^{\prime \prime }+4x^{\prime }+3x=0$$

$$x^{\prime \prime }+x^{\prime }+4x=0$$

$$x^{\prime \prime }-4x^{\prime }+6x=0$$

$$x^{\prime \prime }+9x=0$$

$$x^{\prime \prime }-12x=0$$

$$2x^{\prime \prime }+3x^{\prime }+3x=0$$

$$\frac{x^{\prime \prime }}{2}+\frac{5x^{\prime }}{6}+\frac{2x}{9}=0$$

$$x^{\prime \prime }+x^{\prime }+x=0$$

$$x^{\prime \prime }+\frac{x^{\prime }}{8}+x=0$$

$$x^{\prime \prime }-2a{x}^{\prime }+a^{2}x=0$$

$$x^{\prime \prime }-x^{\prime }-6x=0$$

$$x^{\prime \prime }-2x^{\prime }+2x=0$$

$$x^{\prime \prime }-x^{\prime }=0$$

$$y^{\prime \prime }-7y^{\prime }+12y=0$$

$$y^{\prime \prime }-2y^{\prime }-8y=0$$

$$y^{\prime \prime }+y^{\prime }-6y=0$$

$$y^{\prime \prime }-y^{\prime }-12y=0$$

$$y^{\prime \prime }+y=0$$

$$y^{\prime \prime }+y=0$$

$$y^{\prime \prime }+y=0$$

$$y^{\prime \prime }-4y^{\prime }+3y=0$$

$$y^{\prime \prime }-2y^{\prime }+y=0$$

$$y^{\prime \prime }-5y^{\prime }+4y=0$$

$$y^{\prime \prime }-5y^{\prime }+6y=0$$

$$y^{\prime \prime }-2y^{\prime }-3y=0$$

$$4y^{\prime \prime }-12y^{\prime }+5y=0$$

$$3y^{\prime \prime }-14y^{\prime }-5y=0$$

$$y^{\prime \prime }-8y^{\prime }+16y=0$$

$$4y^{\prime \prime }+4y^{\prime }+y=0$$

$$y^{\prime \prime }-4y^{\prime }+13y=0$$

$$y^{\prime \prime }+6y^{\prime }+25y=0$$

$$y^{\prime \prime }+9y=0$$

$$4y^{\prime \prime }+y=0$$

$$y^{\prime \prime }-y^{\prime }-12y=0$$

$$y^{\prime \prime }+7y^{\prime }+10y=0$$

$$y^{\prime \prime }-6y^{\prime }+8y=0$$

$$3y^{\prime \prime }+4y^{\prime }-4y=0$$

$$y^{\prime \prime }+6y^{\prime }+9y=0$$

$$4y^{\prime \prime }-12y^{\prime }+9y=0$$

$$y^{\prime \prime }+4y^{\prime }+4y=0$$

$$9y^{\prime \prime }-6y^{\prime }+y=0$$

$$y^{\prime \prime }-4y^{\prime }+29y=0$$

$$y^{\prime \prime }+6y^{\prime }+58y=0$$

$$y^{\prime \prime }+6y^{\prime }+13y=0$$

$$y^{\prime \prime }+2y^{\prime }+5y=0$$

$$9y^{\prime \prime }+6y^{\prime }+5y=0$$

$$4y^{\prime \prime }+4y^{\prime }+37y=0$$

$$x^{\prime \prime }-3x^{\prime }+2x=0$$

$$y^{\prime \prime }-4y^{\prime }+4y=0$$

$$z^{\prime \prime }-4z^{\prime }+13z=0$$