I cannot obtain the 3d plotting of 2 functions (and more functions too):
plot3d([7*x-3*y, x^2-y^2], [x,-5,5], [y,-5,5])$
List [7*x-3*y,x^2-y^2] is not of length 3 -- an error. To debug this
try debugmode(true);
Is this a bug?
My student needed urgently this feature. Sorry if it is known issue.
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Krzysztof Le`sniak