Question: What s the differential equation corresponding to Ly = 0 L y = 0 Ly = 0 , where L = D 3 + 3

Whats the differential equation corresponding to Ly=0L y =0Ly=0, where L=D3+3D2+5L = D^3+3D^2+5L=D3+3D2+5?
d3ydt3+3dydt+5y=0\displaystyle \frac{d^3y}{dt^3}\;+\; 3\,\frac{dy}{dt}\;+\;5y \;=\;0dt3d3y+3dtdy+5y=0
d3ydt3+3d2ydt2+5=0\displaystyle \frac{d^3y}{dt^3}\;+\; 3\,\frac{d^2y}{dt^2}\;+\;5\;=\;0dt3d3y+3dt2d2y+5=0
d3ydt3+3d2ydt2+5y=0\displaystyle \frac{d^3y}{dt^3}\;+\; 3\,\frac{d^2y}{dt^2}\;+\;5y \;=\;0dt3d3y+3dt2d2y+5y=0
d3ydt3+3d2ydt2+5dydt=0\displaystyle \frac{d^3y}{dt^3}\;+\; 3\,\frac{d^2y}{dt^2}\;+\;5\,\frac{dy}{dt}\;=\;0dt3d3y+3dt2d2y+5dtdy=0

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