>	with(plots):VecField:=fieldplot([2*y^2,4*x*y],x=0..2,y=0..4,color=blue,arrows=thick):

>	Path1:=plot([2*t,4*t,t=0..1],thickness=3):

>	Path2:=plot([t,t^2,t=0..2],thickness=3):

>	display(VecField,Path1,Path2);

>	with(plots):VecField2:=fieldplot([1,exp(y)],x=-2..2,y=-1..1,color=blue,arrows=thick):

>	Path3:=plot([2*cos(t),sin(t),t=0..2*Pi],thickness=3,scaling=constrained):

>	display(VecField2,Path3);

>