def METHOD_NAME(first, *rest):
    r"""
    Return the sum of all the arguments.
    INPUT:
    - ``first``, ``*rest`` -- arguments to add
    OUTPUT: sum of the arguments
    EXAMPLES::
        sage: from sage.symbolic.operators import add_vararg
        sage: add_vararg(1, 2, 3, 4, 5, 6, 7)
        28
        sage: x = SR.var('x')
        sage: s = 1 + x + x^2  # symbolic sum
        sage: bool(s.operator()(*s.operands()) == s)
        True
    """
    for r in rest:
        first = first + r
    return first