+@item @strong{Expressions:}
+Every piece of LilyPond input needs to have
+@strong{@{ curly braces @}} placed around the input. These braces tell
+LilyPond that the input is a single music expression, just like(
+parenthesis @samp{()} in mathematics. The braces should
+be surrounded by a space unless they are at the beginning or end of a
+line to avoid ambiguities. For the rest of this manual, most examples
+will omit these braces@footnote{Why omit the braces? Most examples
+in this manual can be inserted into the middle of a longer piece of
+msuic. For these examples, it does not make sense to add @{ @}.},
+but don't forget them in your own music!