<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>
<div ng-app="">
<p>expression a: {{ 3 + 9 }}</p>
<p>expression b: {{ 3 * 9 }}</p>
<p>expression c: {{ 9 / 3 }}</p>
<p>expression d: {{ 9 - 3 }}</p>
</div>
</body>
</html>
<!--
run:
expression a: 12
expression b: 27
expression c: 3
expression d: 6
-->