2021
Hrabrov - Probability Theory ru
    https://stepik.org/course/3089/promo
Python Course for Data Analysis Numpy + Pandas + Matplotlib
    https://tutsnode.net/python-course-for-data-analysis-numpy-pandas-matplotlib/
    magnet:?xt=urn:btih:4f1b5bf8723eab72d88fd0476c308f35a8deebcb
    ! 4.16g, good
2020
OTUS - Math for Data Science Advanced Course ru
    magnet:?xt=urn:btih:bc329cce709c7167f101976b981dd8f9a1ed36e9
    ! 4.30g
OTUS - Math for Data Science Basic Course ru
    magnet:?xt=urn:btih:495ae708b3528cf4f73137b1dc211235f3fb949d
    ! 6.46g good
????
https://www.hackerrank.com/domains/tutorials/10-days-of-statistics