Serialize math element.

    Math objects are not supported at the moment. This is wht we only show error message.

def serialize_math(ctx, document, elem, root):
    """Serialize math element.

    Math objects are not supported at the moment. This is wht we only show error message.
    """

    _div = etree.SubElement(root, 'span')
    if ctx.options['embed_styles']:
        _div.set('style', 'border: 1px solid red')
    _div.text = 'We do not support Math blocks at the moment.'

    fire_hooks(ctx, document, elem, _div, ctx.get_hook('math'))

    return root