plot2d, ,

 (C1) plot2d([2*sin(x), cos(x)], [x, -2*%PI, 2*%PI]); 
plot3d. , , :
 (C2) plot3d([cos(x)*(3+y*cos(x/2)), 
sin(x)*(3+y*cos(x/2)), y*sin(x/2)], [x,-%pi,%pi],[y,-1,1],['grid,40,15]); 

( ). . , .

 (C3) Plot3d(r^.33*cos(th/3),[r,0,1],[th,0,6*%pi], ['grid,12,80], ['transform_xy,polar_to_xy], 
['view_direction,1,1,1.4], ['colour_z,true]); 

,