Hacking a [[Second Order Differential Equation]] into a single order [[Differential Equations|equation]]. $\huge \begin{align} y'' &= 2y' + yt^{2} \\ \deriv{y}{t} &= y' \\ \deriv{y'}{t} &= 2y' + yt^{2} \\ \frac{\d}{\d t}\mat{y \\ y'} &= \mat{y' \\ 2y'+yt^{2}} \end{align} $ \> second order equation \> *looks inside* \> matrices