> f:=(x+(3*y)-1)*exp^(-(x^2(-(y^2));
> plot3d(f,x=-3..3,y=-3..3);
After this, Maple says it is initializing a plot and then I get a big blank space.
I'm also trying to find the contours, but when I type:
> contourplot(f,x=-3..3,y=-3..3,contours=5);
Maple just gives...