A big thank you to the sponsor Jane Street. Take a look at the opportunities they have here: https://www.janestreet.com/join-jane-street/ So many of you sent me this one! It was great to finally figure out what's going on inside. You can buy my books here: https://stevemould.com/books You can support me on Patreon and get access to the exclusive Discord: https://www.patreon.com/stevemould just like these amazing people: Frank Hereford Will Ackerly Brendan Williams Cameron Leigh Middleton Matthew Cocke Frederic Merizen Jeremy Cole Alan Wilderland Joel Van der loo Glenn Watson Doug Peterson Paul Warelis John Zelinka Alnitak Grant Hay Heather Liu Marshall Fitzpatrik Lukas Biewalk JJ Masson Ben McIntosh Damien Szerszinski Twitter: http://twitter.com/moulds Instagram: https://www.instagram.com/stevemouldscience/ Facebook: https://www.facebook.com/stevemouldscience/ Buy nerdy maths things: http://mathsgear.co.uk/