@tomleslie Thank you

Originally, I had used the ctrl+shift+_ notation for my Maple homework to denote partial derivitives (for nice, fancy typesetting), that is until it crashed.

I tried making it as short as I could and this thing crashes the current Maple 2017 worksheet _every_ time. Note that after a crash, Maple runs sluggishly and is very slow to start again after force-killing it (for me anyway).

What originally suprised me was that I could get it to crash without even defining z or x.

Go ahead, try this with other letters... ;)