There are 42 chickens and 48 ducks on the farm, and there are as many geese as there are chickens. How many ducks are fewer than the number of chickens and geese combined?
42 42 [OP_ADD] 48 [OP_SUB]
var_a = 42
var_b = 42
var_c = var_a + var_b
var_d = 48
var_e = var_c - var_d
print(int(var_e))