Link to actual problem [11459] \[ \boxed {x^{\prime \prime }+x^{\prime }+x=4 t +5 \,{\mathrm e}^{-t}} \]
type detected by program
{"kovacic", "second_order_linear_constant_coeff"}
type detected by Maple
[[_2nd_order, _with_linear_symmetries]]
Maple symgen result This shows Maple’s found \(\xi ,\eta \) and the corresponding canonical coordinates \(R,S\)\begin{align*} \left [\underline {\hspace {1.25 ex}}\xi &= 0, \underline {\hspace {1.25 ex}}\eta &= {\mathrm e}^{-\frac {t}{2}} \sin \left (\frac {\sqrt {3}\, t}{2}\right )\right ] \\ \left [R &= t, S \left (R \right ) &= \frac {{\mathrm e}^{\frac {t}{2}} x}{\sin \left (\frac {\sqrt {3}\, t}{2}\right )}\right ] \\ \end{align*}
\begin{align*} \left [\underline {\hspace {1.25 ex}}\xi &= 0, \underline {\hspace {1.25 ex}}\eta &= {\mathrm e}^{-\frac {t}{2}} \cos \left (\frac {\sqrt {3}\, t}{2}\right )\right ] \\ \left [R &= t, S \left (R \right ) &= \frac {{\mathrm e}^{\frac {t}{2}} x}{\cos \left (\frac {\sqrt {3}\, t}{2}\right )}\right ] \\ \end{align*}
\begin{align*} \\ \\ \end{align*}