Question: Problem combining multiple graphs in Maple 12

I am having issues combining multiple graphs into one.  I have 2 sets of points that are defined as p1 and p2, and I have 2 functions defined as p3 and p4.  Here is the command & what it gives me when I try to graph them together...

> plots [display](p1, p2, p3, p4);

 

 plots [display(pointplot([[0, 3.9], [10, 5.3], [20, 7.2], [30, 9.6], [40, 12.9], [50, 17.1], [60, 23.1], [70, 31.4], [80, 38.6], [90, 50.2], [100, 62.9]]), pointplot([[110, 76.0], [120, 92.0], [130, 105.7], [140, 122.8], [150, 131.7], [160, 150.7], [170, 179.0], [180, 205.0], [190, 226.5], [200, 248.7]]), p3, p4)]

 

This is making me crazy!  Any suggestions?!

Niki

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