MathQuill - \sum

dabblet.css

/**
 * MathQuill - \sum
 */
p {
font-size:300%;
}

.bigsymbol {
position:relative;
text-align: center;
display:inline-block;
vertical-align: middle;
}

.bigsymbol sup, .bigsymbol sub, .bigsymbol big {
display:block;
}

.bigsymbol big {
font-size:125%;
}

.bigsymbol sup {
margin-top: -65%;
}
.bigsymbol sub {
margin-top: 35%;
}

dabblet.html

<p>
<span class="block">
	<span class="bigsymbol">
	<big>∑</big>
	<sup><var>a</var><var>s</var></sup>
	<sub>limit limit</sub>
	</span>
	<span class="empty">Tests test</span>
</span></p>

settings.json

{"view":"split-vertical","seethrough":"","prefixfree":"1","page":"all"}