Grapher is a 2D and 3D graphing application that comes bundled in Mac OS X

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Mac Grapher Complex Error Function

I understand the the Grapher app in Mac OS X comes with erf and erfc, the error function and complementary error function. However, when I define y = Re[erfc(-ix)], the Grapher app just returns ...
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Add legends on grapher

Is there a way to add legends to a graph which has plots of multiple functions. I mean I want to say this graph is y=x and this graph is y=x^2 etc.