<camunda:inputParameter xmlns:camunda="http://camunda.org/schema/1.0/bpmn"
                        name="var1">
  <camunda:list>
    <camunda:value>${1+1}</camunda:value>
    <camunda:value>${1+2}</camunda:value>
    <camunda:value>${1+3}</camunda:value>
  </camunda:list>
</camunda:inputParameter>