// this code does not need to be flattened
def main(x, y, z):
  a = x + 3*y - z *2 - x * 12
  3*y - z *2 - x * 12 == a - x
  (x + y) - ((z + 3*x) - y) == (x - y) + ((2*x - 4*y) + (4*y - 2*z))
  return x