|  | LIB "nets.lib";
ring r1=101,(x,y,z),lp;
poly a=2x3y4+300xy-234z23;
poly b=2x3y4z;
poly c=x3y4z5;
poly d=5x6y7z10;
poly e=2x3y;
poly f=4y5z8;
matrix M[2][3]=a,b,c,d,e,f;
print(M);
==> 2x3y4-3xy-32z23,2x3y4z,x3y4z5,
==> 5x6y7z10,       2x3y,  4y5z8  
netmatrix(M);
==> | 2x3y4-3xy-32z23 2x3y4z x3y4z5 |
==> | 5x6y7z10        2x3y   4y5z8  |
==> 
 |