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
