=identifier>term</span><span class=special>) </span><span class=special>| </span><span class=special>(</span><span class=literal>'-' </span><span class=special>&gt;&gt; </span><span class=identifier>term</span><span class=special>)),
                    </span><span class=identifier>term        </span><span class=special>= </span><span class=identifier>factor </span><span class=special>&gt;&gt; </span><span class=special>*((</span><span class=literal>'*' </span><span class=special>&gt;&gt; </span><span clas