.vec {
	line-height: 25px;
	background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='150' height='6'><line x1='0' y1='3' x2='150' y2='3' style='stroke:rgb(0,0,0);stroke-width:1;'/><line x1='150' y1='3' x2='145' y2='0' style='stroke:rgb(0,0,0);stroke-width:1;'/><line x1='150' y1='3' x2='145' y2='6' style='stroke:rgb(0,0,0);stroke-width:1;'/></svg>");
	background-repeat: no-repeat;
	background-position: top right;
	padding-top: 5px;
}
.alg {
	line-height: 25px;
	background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='150' height='6'><line x1='0' y1='3' x2='150' y2='3' style='stroke:rgb(0,0,0);stroke-width:1;'/></svg>");
	background-repeat: no-repeat;
	background-position: top left;
	padding-top: 5px;
}
.frac {
	display: inline-block;
	text-align: center;
	vertical-align: middle;
}
.num {
	display: block;
	padding-bottom: 4px;
	border-bottom: 1px solid;
}
.den {
	display: block;
	padding-top: 5px;
}