20001em;vertical-align:-0.35001em;"></span><span class="mord coloredeq eqb" style=""><span class="mord" style=""><span class="mord mathcal coloredeq eqi" style="">R</span></span><span class="mord" style=""><span class="delimsizing size1" style=""><span style="">(</span></span></span><span class="mord" style=""><span class="mord coloredeq eqc" style=""><span class="mord" style=""><span class="mord mathcal coloredeq eqh" style="margin-right:0.09931em">F</span></span><span class="msupsub"><span class="vlist-t 