Question: why won't this plot?

I seem to keep running into things in Maple that I just can't get to plot. I have been using Mathcad and am trying to learn to do everything in Maple, but keep finding myself having to go to Mathcad to do even the simplest things. Could someone please help and explain to me what I'm doing wrong? I have with(plots) and restart() at the top of my page. I then do this: g1 := implicitplot(3x^2,x=0..10,y=0..10); display( g1 ); This results in it just printing the display line again, no graph is shown. I can get this to work using the plot command but since its not very easy in Maple to print multiple equations on a single graph I have started trying to do them this way. If there is a better way to do graphs then please tell me this as well as I'm trying to learn Maple as best as I can. Thanks, glenn
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