> However, now it appears that Alex's site no longer exists
In 2019 Alex moved to new site, which also is not availabale anymore, BUT there are backups of both sites.[0,3]
JFTR, You may try contact with Alex Spartails via Facebook & Instagram.[4,5]
[0] http://web.archive.org/web/20200127012510/http://mathscheats...
[1] https://drive.google.com/file/d/1MM2Hu5qlptkg8dNLM9QibeXHErL...
[2] https://www.scribd.com/document/412167295/the-mathematics-ha...
[3] http://web.archive.org/web/20190530065518/https://www.alexsp...
[4] https://m.facebook.com/alexspartails
[5] https://instagram.com/alexspartails
> However, now it appears that Alex's site no longer exists
In 2019 Alex moved to new site, which also is not availabale anymore, BUT there are backups of both sites.[0,3]
JFTR, You may try contact with Alex Spartails via Facebook & Instagram.[4,5]
[0] http://web.archive.org/web/20200127012510/http://mathscheats...
[1] https://drive.google.com/file/d/1MM2Hu5qlptkg8dNLM9QibeXHErL...
[2] https://www.scribd.com/document/412167295/the-mathematics-ha...
[3] http://web.archive.org/web/20190530065518/https://www.alexsp...
[4] https://m.facebook.com/alexspartails
[5] https://instagram.com/alexspartails