coefficients in
        `c` is evaluated for every element of `x`. If False, `x` is broadcast
        over the columns of `c` for the evaluation.  This keyword is useful
        when `c` is multidimensional. The default value is True.

        .. versionadded:: 1.7.0

    Returns
    -------
    values : ndarray, algebra_like
        The shape of the return value is described above.

    See Also
    --------
    legval2d, leggrid2d, legval3d, leggrid3d

    Notes
    -----
    The evaluation uses Clenshaw recursion, aka synthetic division.

    r