<div class="dem">   
<ul class="desc">

</desc_item></li><li>
\fold{mainS5S4F_desc_item1}{<span class="enum_item">Premier  Cas:</span>

}

</li><li>
\fold{mainS5S4F_desc_item2}{<span class="enum_item">Deuxime  Cas:</span>

}

</li></ul>
</div> <div class="fin"> Fin de la dmonstration</div>