You want to share 7 apples with 2 monkeys. In this case, if the monkeys get at least one apple, how many ways can monkeys share the apple?
2 7 [OP_ADD] 2 1 [OP_MUL] [OP_SUB] 1 [OP_SUB] 7 2 1 [OP_MUL] [OP_SUB] [OP_COMB]
var_a = 2
var_b = 7
var_c = var_a + var_b
var_d = 2
var_e = 1
var_f = var_d * var_e
var_g = var_c - var_f
var_h = 1
var_i = var_g - var_h
var_j = 7
var_k = 2
var_l = 1
var_m = var_k * var_l
var_n = var_j - var_m
var_o = 1
var_i = int(var_i)
var_n = int(var_n)
for i, elem in enumerate(range(var_n)):
    var_o = var_o * (var_i-i)
for i, elem in enumerate(range(var_n)):
    var_o = var_o / (i+1)
print(int(var_o))