<meta charset="UTF-8">
<script>
exe = 1;
document.write("<h2>" + "Conta" + "</h2>");
document.write((exe) + " + " + (exe) + " = 2 ");
document.write("<br>");
exe = 2;
document.write((exe) + " + " + (exe) + " = 4 ");
document.write("<br>");
</script>
