How many three-digit integers can be made by drawing 3 out of 4 cards with the numbers 0, 4, 5, and 7 written on them?
4 3 [OP_PERM] 3 3 [OP_PERM] [OP_SUB]
var_a = 4
var_b = 3
var_c = 1
var_a = int(var_a)
var_b = int(var_b)
for i, elem in enumerate(range(var_b)):
    var_c = var_c * (var_a-i)
var_d = 3
var_e = 3
var_f = 1
var_d = int(var_d)
var_e = int(var_e)
for i, elem in enumerate(range(var_e)):
    var_f = var_f * (var_d-i)
var_g = var_c - var_f
print(int(var_g))