How is MMR calculated League of Legends?

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Tags

1. #recent
2. #lower
3. #higher
4. #actual
5. #calculated
6. #placing
7. #correspond
8. #performance
9. #roughly
10. #values
11. #works
12. #speculate
13. #which
14. #hidden
15. #division
16. #means
17. #position
18. #observation
19. #players
20. #based
21. #exact