p { 
    width:90%;
 }

td.l { 
       width:550px;
 }

.ex { 
      padding:3px;
      background-color:#cfcfcf;
      width:90%;
 }

td.r { 
       text-align:left;
       }

tr.row { 
         vertical-align:top;
         }

.t tr .r { 
           text-align:right;
           padding-right:10px;
           font-style:italic;
                }