There are 57 roses and 82 tulips in the flower bed. There are 13 more tulips than the sum of roses and lilies. How many lilies are in the flower bed?
82 13 [OP_SUB] 57 [OP_SUB]
var_a = 82
var_b = 13
var_c = var_a - var_b
var_d = 57
var_e = var_c - var_d
print(int(var_e))