(20+48)-( 40+8):2=
[6:2.8+(20.4-30)+7]:3+12=
68:17.12-8=
{4.6-2.50+[125-92]-44.2}.(200:4.2):100=
(38:2+8.16)-[6:3.18+(28-14)]=
128-36.2+[49-13+(54:6.2)]-60=
8:(3-5)-2.[-3.(1-4)-6:(1-3)]=
25.3-8+45:5-(40-8:2.5)-33=
[4.25-(18+36-10).2+3]+3.5=
30
50
39
-7
40
97
-131
44
23