mathem.seLook-alike domains registered recently

A name made to be mistaken for another: a typo, a swapped or extra letter, characters that look alike (0 for o), extra words, or the same name under another extension. Some are harmless — a fan site, a coincidence — and some are registered for phishing or to catch mistyped traffic.

No. Similar doesn’t mean malicious. Open a look-alike’s report to see whether it has a website, where it’s hosted and what its security checks say.

If it’s used for phishing, report it to Google Safe Browsing and to the registrar shown in its report. For a name that infringes your trademark, talk to your registrar or a lawyer about a UDRP complaint.