You made the mistake of adding a number to 36, so when you added the number to 63, you got 70. How much is it if you calculate it correctly?
36 70 63 [OP_SUB] [OP_ADD]
var_a = 36
var_b = 70
var_c = 63
var_d = var_b - var_c
var_e = var_a + var_d
print(int(var_e))