I'm from Vietnamese. My English is not very good :D I have a question about tubeplot in maple. Can you give me a form of tubeplot? I read it in the MapleHelp, but I don't really understand. Example:

y:=x^2+x-1. tubeplot y. create a plot, limit by y, x=1,y=5,around Oy .

Can you hepl me? Thanhks you so much!