Question: different commands??

I use two different maple commands but I get the same graph. I am not sure why. I am new to Maple. Thanks in advance. The two commands are:

 

plot( {2-x^2,x^2},x=-1..1)    and,

 

plot( [2-x^2,x^2],x=-1..1)

 

 

Please let me know.

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