The interview process consisted of a 30-minute video interview where they asked common questions to try and learn a bit about you.

Then, a take-home 60-minute coding challenge was assigned.

I must say I was a little surprised when it came to the complexity of the last question (there were a total of 3).

Given an algebraic string (e.g., "22.5n-1.5/4") and a result (e.g., 14), return the value of 'n' as a double with 4 points of precision. I must say, for a 1-hour challenge with 2 other questions, this seemed unfair. You essentially have to write a parser.