Question: How do I plot mulitple functions in Maple 11?

I am just starting to work with Maple 11, and having problems plotting two (single variable) functions in the same set of equations. I had thought that the way to do this was to plot a function, create a second expresssion in Math mode, and then simply drag the expression into the plot area. What happens is that the expression disappears, and nothing happens to the plot. when I use plot({expression1,expression2}) , the plots appear just fine. Are there any tips for me? I'm trying to write an "introduction to Maple" for beginning Calc I students, so I want to be able to give them the simplest instructions possible. Thank you!! Shannon
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