Has anyone been able to completely understand all the workings done in the article? I have a calculus and linear algebra background but I still can’t completely understand all the workings in the article. Should i try again or move on? 
Hello, @Sami_Ullah5,
Which reading? This? " Clarification For: What does this have to do with the brain?"?
If so, I would recommend you to just take away the formulae as is and then move on.
Cheers,
Raymond
The one on feed forward neural networks in depth
That reading links to this forum thread, correct?
Do you have specific questions?
Otherwise I recommend you accept those derivations as fact and move on through the course.