You have 4 blue pencils and 1 red pencil. How many different ways can you place 5 pencils in a row?
4 1 [OP_ADD] 4 [OP_COMB]
var_a = 4
var_b = 1
var_c = var_a + var_b
var_d = 4
var_e = 1
var_c = int(var_c)
var_d = int(var_d)
for i, elem in enumerate(range(var_d)):
    var_e = var_e * (var_c-i)
for i, elem in enumerate(range(var_d)):
    var_e = var_e / (i+1)
print(int(var_e))