Operator Precedence in javascript

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<h4> Operator Precedence In Javascript.</h4>

<script>
let x = 10;
let y = 5;
let z = 3;

document.write( x + y ** z ); 
/* Result is 135  [ 5 * 5 * 5 + 10 ]  */ 
document.write("<br>");
document.write( (x + y) ** z );
/* Result is 3375 [ 10 + 5 = 15 * 15 * 15 ]  */ 
</script>

</body>
</html>