How to subtract the cumulative values of confirmed, recovered and deseased?

I would like to subtract the cumulative values of confirmed, recovered and deceased. However, it does not work, Google BigQuery keeps giving me this error message (look at the pic). All attributes are INTEGER.

Answer

The error message is pretty clear. You have mixed types in the data — suggesting that something is wrong.

Presumably, the offending value is cumulative_recovered which you do not show to be an int64.