Ways to study mathematics while commuting I spend approximately 3 to 4 hours on public transport everyday. I try to maximize the usage of this time by checking email etc on my phone.
Are there any tips to study mathematics while commuting? 
Thanks for sharing! Just want to make full use of the time spent commuting!
When going to uni I would spend 5 hours on a train every day. I would use that time to solve lots of problems, individual ones, such as the ones found at the end of each chapter in the book. Studying concepts while commuting is too hard as the train is too distracting an environment. So I would just do problems after problems on the train, and save the studying of the concepts themselves for another time.
IF you want to apply mathematics, e.g. increase your command of algebra: use khan academy. THe courses for math a re simply great: https://www.khanacademy.org/.
I am doing this right now for my daily 2 hour commute. THe caveat: you need internet access, at least sporadically.