Display:

$\left[x\colon x< 5\right]$

Source:

<list order="numeric">
     <bvar>
          <ci> x </ci>
     </bvar>
     <condition>
          <apply>
               <lt/>
               <ci> x </ci>
               <cn> 5 </cn>
          </apply>
     </condition>
     <ci> x </ci>
</list>