VALIGN=BASELINE></TD>
</TR>
<TR>
<TD ALIGN=RIGHT VALIGN=BASELINE><A NAME="prod8">factor</A></TD>
<TD ALIGN=CENTER VALIGN=BASELINE>::=</TD>
<TD ALIGN=LEFT VALIGN=BASELINE>"(" <A HREF="#prod4">expr</A> ")"</TD>
</TR>
<TR>
<TD ALIGN=RIGHT VALIGN=BASELINE></TD>
<TD ALIGN=CENTER VALIGN=BASELINE>|</TD>
<TD ALIGN=LEFT VALIGN=BASELINE><A HREF="#prod3">variable</A></TD>
</TR>
<TR>
<TD ALIGN=RIGHT VALIGN=BASELINE></TD>
<TD ALIGN=CENTER VALIGN=BASELINE>|</TD>
<TD ALIGN=LEFT VALIGN=BASELINE>&lt;NUMBER&gt;</TD>
</TR>
<T