## Quality and popularity formulas for the article
**Rolling in the Deep** ^{EN}

$$Quality=1/c∑↙{i=1}↖c nm_i-RS=1/6(100+100+61.54+100+86.67+100)$$

where:

- $nm_i$ is normalized quality metric $i$
- $c$ is the number of quality metrics
- $RS$ is the reducing score (if exists)

$$GlobalAI=|⋃↙{lang=1}↖29 Authors_{lang}|=9$$

$$PopGlobal=∑↙{lang=1}↖29 PopLocal_{lang}=8303$$

where:

- $lang$ is an index of language version
- $AI$ means Authors’ Interest (number of authors)
- $Pop$ means popularity of the article (number of page views)
- $Authors_{lang}$ is a set of unique names of the authors of article "Rolling in the Deep" in language $lang$ during September 2021
- $PopLocal_{lang}$ is a popularity of article "Rolling in the Deep" in language $lang$ in September 2021

The results of the calculations may be slightly different because of rounded values of normalized metrics in formulas