Exponentiation Precedence in PHP

The exponentiation operation has precedence over multiplication and division. In the following example, exponentiation will be performed first, and then multiplication:

php<?php
  echo 2 * 2 ** 3;
?>

Задание 1

Without running the code, determine what will be displayed on the screen:

php<?php
  $a = 3 * 2 ** 3;
  echo $a;
?>

Задание 2

Without running the code, determine what will be displayed on the screen:

php<?php
  $a = (3 * 2) ** 3;
  echo $a;
?>

Задание 3

Without running the code, determine what will be displayed on the screen:

php<?php
  $a = 3 * 2 ** (3 + 1);
  echo $a;
?>

Задание 4

Without running the code, determine what will be displayed on the screen:

php<?php
  $a = 2 ** 3 * 3;
  echo $a;
?>

Задание 5

Without running the code, determine what will be displayed on the screen:

php<?php
  $a = 3 * 2 ** 3 * 3;
  echo $a;
?>