def cheb_range_simplifier(low, high, text=False):
    """
    >>> low, high = 0.0023046250851646434, 4.7088985707840125
    >>> cheb_range_simplifier(low, high, text=True)
    'chebval(0.42493574399544564724*(x + -2.3556015979345885647), coeffs)'
    """
    constant = 0.5 * (-low - high)
    factor = 2.0 / (high - low)
    if text:
        return 'chebval(%.20g*(x + %.20g), coeffs)' % (factor, constant)
    return constant, factor
