B+c
30+2=32
40+30=70
200+900=1100
1584+2500=4084.
1458+4500=5958
80002+77=80079
a-(b+c)
36-(30+2)=4
100-(40+30)=30
52200-(200+900)=51100
38584-(1584+2500)=34500
29458-(1458+4500)=23500
80202-(80002+77)=125
a-b-c=36-30-2=4
100-40-30=30
52200-200-900=51100
38584-1584-2500=34500
29458-1458-4500=23500
80202-80002-77=123