Copy-pasting from the correct answer appears to give the correct preview when I right-click and select copy the latex. But it still takes a really long time to check the answer to part d. Here’s the problem again if you want to try to trouble-shoot that: Doenet
However, if I just highlight the correct answer shown there and ctrl c, ctrl v and then make it appear to look right, gives this:
As I said in the other thread, I may consider this a feature rather than a bug; students should not normally be copy-pasting expressions. I have seen them sometimes do calculations in desmos and copy-paste numerical answers, but those won’t be expressions. I just didn’t know to ask them before if they had typed the answer themselves or copy-pasted it in. But since me retyping things made it work, I now suspect that’s what happened on those ones.