my friends and I discovered that the GeoGebra sign in page has a ton of "exploits" that can get you to a completely unrestricted Google page.
the first one got patched after about a month, we just discovered this "version" too.
every Chromebook in the school district has GeoGebra pre-installed through the chrome web store, and any screen monitoring bullsh#t the teachers use cant even see it for some reason. there are even more "exploits" than this using different school provided apps. (I'm literally writing this in GeoGebra lmao)