Fundamentals
numberprint=lambda n: int(''.join(str(x) for x in (list(range(1, n+1)) + list(range(n-1, 0, -1)))))
numberprint = lambda n: int(''.join(str(x) for x in (list(range(1, n+1)) + list(range(n-1, 0, -1)))))- numberprint=lambda n: int(''.join(str(x) for x in (list(range(1, n+1)) + list(range(n-1, 0, -1)))))