SOURCE CODE:
<script language="javascript">
var total1, total2, total3;
total1=100*25+50/2+50;
total2=(100*25)+50/(2+50);
total3=100*(25+50)/2+50;
document.write("total1="+total1+"<br>");
document.write("total2="+total2+"<br>");
document.write("total3="+total3);
</script>