There are 156 pigs and 267 cows in the barn. If 115 of them were sold today, how many are left in the barn?
156 267 [OP_ADD] 115 [OP_SUB]
var_a = 156
var_b = 267
var_c = var_a + var_b
var_d = 115
var_e = var_c - var_d
print(int(var_e))