COMMENT ⊗   VALID 00002 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	\magnification=1200
C00005 ENDMK
C⊗;
\magnification=1200
\font\Z=manfnt
\def\META{{\Z METAFONT}} 
\def\La{L\kern-.1667em\raise.5ex\hbox{a}\kern-.1em}
\def\fl#1{\null\par \leftline{\bf #1?}}
\def\teX{\null\kern1.5pt\TeX}
\def\The{\null\kern1.5pt The}
\parskip 10pt plus 1pt
\parindent=0pt
\def\AmSTeX{$\cal A\kern-.1667em\lower.5ex\hbox{$\cal M$}\kern-.125em S$-\TeX}
\pageno=1
\font\sixrm=amr6
\font\eightrm=amr8
\font\ninerm=amr9
\font\rmone=amr10 scaled \magstep1
\font\rmtwo=amr10 scaled \magstep2
\font\rmthree=amr10 scaled \magstep3
\font\rmfour=amr10 scaled \magstep4
\font\bfl=ambx10 scaled \magstep2
\font\amss=amss10  \font\amssi=amssi10  \font\amsltt=amsltt10
\font\amu=amu10  \font\ambi=ambi10
\font\Dunh=amdunh10  \font\amssbx=amssbx10  \font\amcsc=amcsc10
\def\\{{\tt \char'134}}

\def\trademark{{\kern-.13em\raise 1ex\hbox{\fiverm
\ooalign {\hfil \raise .08ex\hbox {R}\hfil \crcr 
\lower .25ex\hbox{\mathhexbox 20D}}}}}

\def\lbr{{\tt \char'173}}  \def\rbr{{\tt \char'175}}  \def\rrbr{{\tt \char'175\char'175}}
\def\und{\tt \char'137}
\def\til{\tt \char'176}
\def\sup{\tt \char'136}
\def\cs{{\sl control sequence}} 
\def\css{{\sl control sequences}} 
\def\Css{{\sl Control sequences}}
\font\ttt=amtt9

\TeX's forte is mathematics such as:
$$
\sum_{i=1}↑{\infty}{1\over2↑i}=1,\quad
\{\underbrace{\overbrace{\mathstrut a,\ldots,a}
      ↑{k\;a\mathchar`'\rm s},
    \overbrace{\mathstrut b,\ldots,b}
      ↑{l\;b\mathchar`'\rm s}}_{k+l\rm\;elements}\},\quad
\sqrt{1+\sqrt{1+\sqrt{1+x}}},\quad \hbox{or}\quad
A=\pmatrix{
a_{11}&\ldots&a_{1n}\cr
\vdots&\ddots&\vdots\cr
a_{m1}&\ldots&a_{mn}\cr}.
$$

\bye