How do I use Google math?

Excuse me, I'm curious about something. I've heard that Google has a really cool math feature, but I'm not quite sure how to use it. Could you walk me through the process? For example, if I wanted to solve a simple equation like 2+2, how would I type it into Google to get the answer? Or if I needed to do something more complex like solve for x in a quadratic equation, is that even possible? I'd really appreciate your help in understanding how to make the most of this tool. Thanks in advance!