0.5-0.5*0.5-0.5*0.5=0
0.5+0.5-0.5+0.5-0.5=0.5
0.5+0.5*0.5+0.5*0.5=1
0.5+0.5+0.5+0.5-0.5=1.5
(0.5+0.50/0.5+0.5-0.5=2
0.5+0.5+0.5+0.5+0.5=2.5
(0.5+0.50)/0.5+0.5+0.5=3
(0.5+0.5+0.5)/0.5+0.5=3.5
0.5-0.5*0.5-0.5*0.5=0
0.5+0.5-0.5+0.5-0.5=0.5
0.5+0.5*0.5+0.5*0.5=1
0.5+0.5+0.5+0.5-0.5=1.5
(0.5+0.50/0.5+0.5-0.5=2
0.5+0.5+0.5+0.5+0.5=2.5
(0.5+0.50)/0.5+0.5+0.5=3
(0.5+0.5+0.5)/0.5+0.5=3.5