Simplify the following expression 
Definitions:
Data
Information that has been translated into a form that is efficient for movement or processing.
Weighted Mean
An average where each data point contributes to the mean with a weight that reflects its importance or frequency.
Median
The middle value in a set of data when the values are arranged in ascending or descending order, or the average of the two middle values when there is an even number of values.
Extreme Scores
Observations or data points that are significantly higher or lower than the majority of other values in a dataset, potentially influencing overall analysis.
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