>	with(plots):with(DEtools):

Warning, the name changecoords has been redefined

>	de:=16*diff(y(t),t$2)-8*diff(y(t),t)+145*y(t)=0;

>	sol:=dsolve({de,y(0)=-2,D(y)(0)=1});

>	sol:=solve(sol,y(t));

>	plot(sol,t=0..10);

>

>	de:=diff(y(t),t$2)-diff(y(t),t)+1/4*y(t)=0;

>	sol:=dsolve({de,y(0)=2,D(y)(0)=1/3});

>	sol:=solve(sol,y(t));

>	plot(sol,t=0..3.5);

>	sol2:=solve(dsolve({de,y(0)=2,D(y)(0)=2}),y(t));

>	plot({sol,sol2},t=0..3,y=0..6);

>	sol3:=solve(dsolve({de,y(0)=2,D(y)(0)=0.65}),y(t)):

>	plot({sol,sol2,sol3},t=0..3,y=0..6);