I$\text{'}$m doing ODE in matlab. I have $y^{\text{'}\text{'}}-y^{\text{'}}-12y=5e^{4x}$as shown and particular integral, y$\_$p$=$ C$3*$ x $*$ exp$(4*$x$).$What are the matlab codings to substitute the y$\_$p into the first equation and finally using comparison methods to get C$3$ and display it$?$