.dblarrow {
    font-size: 125%;
    top: -0.4ex;
    margin: 0 2px;
}
.dblarrow:after {
    content:"\2190";
    position: absolute;
    left: 0;
    top: 0.5ex;
}
.fraction {
    display: inline-block;
    vertical-align: middle; 
    margin: 0 0.2em 0.4ex;
    text-align: center;
    font-weight: 500;
}
.fraction > span {
    display: block;
    padding-top: 0.15em;
}
.fraction span.fdn {border-top: thin solid black;}
.fraction span.bar {display: none;}
.sy, 
.sy-r, 
.sy-g, 
.sy-b {
    position: relative;
    text-align: center;
}
.sy-r {color: #f00;}
.sy-g {color: #4f8c4f;}
.sy-b {color: #00f;}
.oxbr, 
.oncapital, 
.onsmall {
    position: absolute;
    top: -1em;
    left: 0px;
    width: 100%;
    font-size: 70%;
    text-align: center;
}
.onsmall {
    top: -0.7em;
}
.sy {
    position: relative;
    text-align: center;
}
.oncapital, .onsmall {
    position: absolute;
    top: -1em;
    left: 0px;
    width: 100%;
    font-size: 70%;
    text-align: center;
}
.onsmall {
    top: -0.7em;
}
.limes {
    position: relative;
    display: inline-block;
    margin: 0 0.2em;
    vertical-align: middle; 
    text-align: center;
}
.limes > span { 
    display: block;
    margin:-0.5ex auto;
}
.limes span.numup,
.limes span.overdn {
    font-size: 70%;
}
.intsuma {
    position: relative;
    display: inline-block;
    vertical-align: middle;
    text-align: center;
    font-weight: 500;
}
.intsuma > span {
    display: block;
    font-size: 70%;
}
.intsuma .lim-up {
    margin-bottom: -1.0ex;
}
.intsuma .lim {
    margin-top: -0.5ex;
}
.intsuma .sum {
    font-size: 1.5em;
    font-weight: lighter;
}
.intsuma .sum-frac {
    font-size: 1.5em;
    font-weight: 500;
}
.radical {
    position: relative;
    font-size: 1.6em;
    vertical-align: middle;
    font-weight: 500;
}
.n-root {
   /* position: absolute;
    top: -0.333em;
    left: 0.333em;
    font-size: 45%;*/
    position: relative;
    top: -0.1em;
    left: 0.1em;
    font-size: 80%;
}
.radicand { 
    padding: 0.25em 0.25em;
    border-top: thin black solid;
    font-weight: 500;
}
.whole, .whole-big {
    display: inline-block;
    vertical-align: middle; 
    margin: 0 0.2em 0.4ex;
    text-align: center;
    font-weight: 500;
}
.whole > span{
	display: block;
    font-size: 150%;
}
.whole-big > span{
	display: block;
    font-size: 300%;
}
.sup
{
	top: -1.96em;
}
.matrix
{
	margin-bottom: .3rem;
	position: relative;
    display: inline-block;
    border: 2px solid black;
}
.matrix .board
{
	display: block;
}
.m-row
{
	display: block;
	text-align: center;
}
.m-col
{
	padding: .5rem;
}
.m-top, .m-bottom
{
	padding: .15rem;
	background: #fff;
	float: left;
	width: calc(100% - .6rem);
	margin-left: .3rem;
	margin-right: .3rem;
}
.m-top
{
	margin-top: -.2rem;
}
.m-bottom
{
	margin-bottom: -.2rem;
}