3 <operator name="(" form="prefix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
4 <operator name="(" form="infix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
5 <operator name=")" form="postfix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
6 <operator name=")" form="infix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
7 <operator name="[" form="prefix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
8 <operator name="[" form="infix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
9 <operator name="]" form="postfix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
10 <operator name="]" form="infix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
11 <operator name="{" form="prefix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
12 <operator name="{" form="infix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
13 <operator name="}" form="postfix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>
14 <operator name="}" form="infix" fence="true" stretchy="false" lspace="0em" rspace="0em"/>