There are 85 pigs and cows in total. When there are 48 pigs, how many more cows are there than pigs?
48 85 48 [OP_SUB] [OP_SUB]
var_a = 48
var_b = 85
var_c = 48
var_d = var_b - var_c
var_e = var_a - var_d
print(int(var_e))