|  |  D.12.4.2 tail Procedure from libraryteachstd.lib(see  teachstd_lib).
 
Example:Usage:
tail(f); f poly or vector
Return:
f-lead(f), the tail of f of type poly
 |  | LIB "teachstd.lib";
ring r=0,(x,y,z),ls;
tail((y+z+x+xyz)**2);
==> 2yz+y2+2xz+2xy+2xyz2+2xy2z+x2+2x2yz+x2y2z2
ring s=0,(x,y,z),dp;
tail((y+z+x+xyz)**2);
==> 2x2yz+2xy2z+2xyz2+x2+2xy+y2+2xz+2yz+z2
 | 
 
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