> with(plots):
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> plot({sin(x),sin(2*x),sin(3*x)},x=0..2*Pi,title=`3 sin's by the good doc`);
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> plot3d(sin(x)*sin(y),x=0..2*Pi,y=0..2*Pi,title=`egg crate by the good doc`,\
style=patch,labels=['x','y','z'],axes=boxed);
> implicitplot3d(x^2-y^2-4*z^2+4*x-6*y-8*z -13,x=-6..6,y=-6..6,z=-6..6,\
title=`2 sheets to the good doc`,style=wireframe,labels=['x','y','z'],axes=boxed);
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> plot3d(sin(x*y),x=0..2*Pi,y=0..2*Pi,title=`zigs more by the good doc`,\
style=patchnogrid,labels=['x','y','z'],axes=boxed,grid=[60,60]);
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> implicitplot3d(x^2-y^2-z,x=-3..3,y=-3..3,z=-3..3,labels=['x','y','z'],\
axes=boxed,title=`at last g.d.`);
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>