-> https://ml-cheatsheet.readthedocs.io/en/latest/index.html
-> https://www.youtube.com/results?search_query=statquest
-> https://www.educative.io/courses/grokking-the-machine-learning-interview
-> https://github.com/afshinea/stanford-cs-229-machine-learning
-> https://github.com/afshinea/stanford-cs-230-deep-learning
-> https://developers.google.com/machine-learning/crash-course/logistic-regression/model-training
-> https://gombru.github.io/2018/05/23/cross_entropy_loss/ (losses).
-> https://stevensmit.me/softmax-or-log-softmax-for-cross-entropy-loss-in-tensorflow/ \