15/3+2=3

15/3(1)=7

(7)(2)+(3)(2)=20

2/3+1=5/3

4-8/2=-2

5/2+3/2=4

[(3)(3)+(2)(2)]2=26

1/3+4/6+2/3=7/6

(7/5)/1=8/5

(2/3)(5/2)=7/5