Algebraic Topology - some solutions and resources
https://neil-strickland.staff.shef.ac.uk/courses/algtop/
https://www.maths.tcd.ie/~dwilkins/Courses/421/
http://people.bath.ac.uk/feb/ma40040.html
https://www3.nd.edu/~lnicolae/ProblemsHatcher.pdf
https://www.math.ucla.edu/~gyueun.lee/writing/qual_sols.pdf