`` where ``f`` in ``GF(p)[x]`` and ``a`` in ``GF(p)``.

    Examples
    ========

    >>> from sympy.polys.domains import ZZ
    >>> from sympy.polys.galoistools import gf_add_ground

    >>> gf_add_ground([3, 2, 4], 2, 5, ZZ)
    [3, 2, 1]

    r