.xyz is a top-level domain name. It was proposed in ICANN 's New generic top-level domain (gTLD) Program, and became available to the general public on June 2, 2014.

The equations section lets you solve an equation or system of equations. You can usually find the exact answer or, if necessary, a numerical answer to almost any accuracy you require.

Newer top level domains are notorious for being favored by cyber criminals. But why exactly we see so much spam coming from .xyz, .click and these other TLDs...