Request for arithmetic operations in the Functions

I don’t know If I have to make the same issue on GitHub, so I leave it here.
It will be great (IMHO) If you will add some more maths in the Functions. For example, simply arithmetic operations like addition, subtraction, multiplication and division seems useful for manual converting incoming data.

Grafana rely on that the datasources does almost all arithmetic calculations. That’s look like you’re using Graphite as datasource - if that’s correct you can use nested queries to achieve some arithmetic calculations of multiple series.