5個5,用+ - * /四種運算符號各一次,怎樣算出結果分別等於2,3,4,6

5個5,用+ - * /四種運算符號各一次,怎樣算出結果分別等於2,3,4,6

(5*5-5)/(5+5)=2
5-5/5-5/5=3或(5*5-5-5)/5=3
5-(5/5)/(5/5)=4 5+(5/5)/(5/5)=6