<?php 

$english = 110; //英语成绩

$math= 118; //数学成绩

$biological = 80; //生物成绩

$physical = 90; //物理成绩

$sum = $english+$math+$biological+$physical;

$avg = $sum/4;

$X = $math - $english;

$x2 = $english * $english;

echo "总分:".$sum."<br />";

echo "平均分:".$avg."<br />";

echo "数学比英语高的分数:".$x."<br />";

echo "英语成绩的平方:".$x2."<br />";