% --- start of displayed preamble in the book ---

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input metaobj
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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);
drawObj(matc);
endfig;
end;