Ok, I removed the drain pipes to reassess the situation. It looks like I can just reapply whatever the sealant is (any recommendations?) to the black water pipe, shove it back in, and tighten the clamp.
Oh, and the sealant feels just like old chewing gum. Have no idea what it is.
The problem is going to be the grey water pipe. Don't know of you can see it in this photo, but the end broke off in the 90-elbow it connected to. I've somehow got to figure out a way to replace this piece and the elbow, both of which are still glued to other pieces which I would like to salvage if possible.
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