The swimming club has three first graders, two second graders, and two third graders. Find the number of ways to select 3 representatives of a club.
3 2 [OP_ADD] 2 [OP_ADD] 3 [OP_COMB]
var_a = 3
var_b = 2
var_c = var_a + var_b
var_d = 2
var_e = var_c + var_d
var_f = 3
var_g = 1
var_e = int(var_e)
var_f = int(var_f)
for i, elem in enumerate(range(var_f)):
    var_g = var_g * (var_e-i)
for i, elem in enumerate(range(var_f)):
    var_g = var_g / (i+1)
print(int(var_g))