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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def dbMath(self, typ, field, op, value):
 """ Performs some database math on the given field. This will be database specific implementations and should return the resulting database operation. :param field: <str> :param op: <orb.Query.Math> :param target: <variant> :param context: <orb.Context> || None :return: <str> """

        ops = orb.Query.Math(op)
        format = self.MathMap.get(typ, {}).get(ops) or self.MathMap.get('Default').get(ops) or '{field}'
        return format.format(field=field, value=value)