I did a pretty nasty derivation of third order approximation for first derivative by hand. I got all the nasty Newton coefficients right, and was very precise until THE VERY LAST LINE, where I butchered simple math operations.
I wonder if there is a name for my particular brand of stupidity.

I've been in the industry (developer for Finance, backend, quant stuff) for 5 years, and I was thinking to starting looking for a remote developer position in a couple of years.

Do you have any advice? Shall I start studying something? I'm proficient with C++, python and C#, but mainly for numerical algorithms, but I'm sure I can learn other stuff.

Feel like shit, can't focus on work, exam coming up in about 2 weeks...
These stupid numerical algorithms are easy, and yet I manage to get stuck on every shitty little detail, I panic, and I completely lose focus.

This shit has been destroying my academic career... Can't focus properly anymore, cannot study even the simplest things - things that I used to do off the top of my head just a year ago.

My sleep schedule is FUBAR, it's a miracle if I manage to stick to the same timezone for three nights in a row.

Yet I'm still learning new things, trying out stuff and solving problems. Just not the ones that I need to pass my exams.
And before anyone says that university is useless and whatnot: I'm studying aerospace engineering.
I love it, I'm having great fun, learning amazing things, and I've met a lot of amazing people thanks to it. It's one of the few choices in life that I am certain of, and would gladly repeat over and over again.

I've burned myself out from stress, far harder and longer than I've ever done before, and I cannot figure out a way to recover from it.
I've been doing better in the last month or so, but I still cannot get any proper work done, and this is gonna bite me in the ass really hard, once again.

Funny story: I had 3 days of break between the end of the previous semester and the beginning of this one. 3 days of pure freedom.
In those 3 days, I spontaneously reverted to a normal sleep schedule (didn't even need an alarm clock) and felt like a mountain had been lifted off my shoulders.

A year ago I had no idea what truly panicking in the middle of an exam felt like.
My mind had never gone completely blank.
I had no idea what impaired cognitive ability felt like.
This shit is scary.

Why do our minds have to make things so complicated?