Display:

$\int_a^b \cos x\,d x$

Source:

<apply>
     <int/>
     <bvar>
          <ci> x </ci>
     </bvar>
     <interval>
          <ci> a </ci>
          <ci> b </ci>
     </interval>
     <apply>
          <cos/>
          <ci> x </ci>
     </apply>
</apply>