What Desmos's terms say
Desmos's terms of service and privacy policy have 10 rated points: 0 serious, 3 bad, 4 worth knowing and 3 good. 7 apply whenever you use the site, signed in or not; 3 only once you have an account.
Whenever you use Desmos
Bad 3
Third-party cookies are used for statistics
Where it says this ↗Your personal data may be sold or otherwise transferred as part of a bankruptcy proceeding or other type of financial transaction
Where it says this ↗You have a reduced time period to take legal action against the service
Any action against Desmos must begin within one year after the cause of action accrues. If not, the cause of the action is considered as permanently barred.
Where it says this ↗
Worth knowing 2
Your IP address is collected, which can be used to view your approximate location
Where it says this ↗Do Not Track (DNT) headers are ignored and you are tracked anyway even if you set this header
Do Not Track (DNT) headers are ignored and you are tracked anyway even if you set this header.
Where it says this ↗
Good 2
Information is provided about security practices
Where it says this ↗You can access most of the pages on the service's website without revealing any personal information
Created by Docbot version v3
Where it says this ↗
If you have a Desmos account
Worth knowing 2
Your account can be suspended for several reasons
The service can suspend your account for several reasons
Where it says this ↗Your content can be distributed through any media known now or in the future
Created by Docbot version v3
Where it says this ↗
Good 1
You can opt out of receiving promotional communications
You can opt out of promotional communications
Where it says this ↗
The documents
Ratings by ToS;DR volunteers; they can lag behind the current terms. Not legal advice.