Demonstrations of how to achieve certain things, or good question-writing techniques.
Gave some feedback: Ready to use
I've updated the pattern restriction to make the constants optional.
Gave some feedback: Has some problems
Pattern matching doesn't work when the answer simplifies to the form x/(x+b), ie when a = 0. Answer is marked as incorrect unless the answer is specifically of the form (x+0)/(x+b).
Gave some feedback: Should not be used
Saved a checkpoint:
I've removed the unchanged notes from the extended marking script.