1 + 2 = 3
5 - 3 = 2
10 + 15 = 25
20 - 8 = 12
100 + 50 = 150
250 - 100 = 150
12 + 34 = 46
56 - 23 = 33
78 + 91 = 169
150 - 75 = 75
234 + 456 = 690
987 - 654 = 333
1234 + 5678 = 6912
9876 - 5432 = 4444
10000 + 10000 = 20000
50000 - 25000 = 25000
-5 + 10 = 5
-12 - 5 = -17
25 + (-10) = 15
-30 - (-15) = -15
100 + (-50) + 25 = 75
-200 - (-100) + 50 = -50
1500 + 2500 - 1000 = 3000
-3000 + 5000 - 2000 = 0
-10000 + 20000 - 10000 = 0
12345 + 67890 - 45678 = 34557
98765 - 43210 + 12345 = 67800
-50000 + 100000 - 50000 = 0
1000000 + 1000000 - 500000 = 1500000
-2000000 + 3000000 - 1000000 = 0