Hi 92-ers, I don't have the '92, but I'm a Deriver from way back. One of the curious bugs in Derive is that, if you integrate 1/x^2 from -1 to 1, it give you 2. I love this because it teaches students to be wary of computers telling tales. Could someone try this on the '92 and tell me how it comes out? Geoff Hagopian Palm Desert, CA