% --- start of displayed preamble in the book ---
input metaobj
% --- end of displayed preamble in the book ---
defaultfont:="ptmr8r";
warningcheck:=0;
beginfig(1)
newBox.m4(btex Element 4 etex);
newBox.m5
  (btex D$\displaystyle\int_0^\infty
               {1\over 1+x^2}dx$ etex);
newBox.m6(btex Bb etex);
newBox.m7(btex C etex);
newBox.m8(btex D etex);
newMatrix.matc(3,2)
      (m4,nb,m5,m6,m7,m8)
      "halign(ew)", "valign(sns)";
matc.c=origin-(0,10cm);
duplicateObj(matd,matc);
scaleObj(matd,2);
matd.c=origin-(0,15cm);
drawObj(matd);
endfig;
end;