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>> 8*a^2+15*a*b-3*a*c > > My email client is transforming the angle bracket 2 into a superscript, > which happens to be right here but I think I'll switch it off. > > Moral here is not to get DCGLUG members to do your homework, but to > trust the machines ;) Hehe - I only asked for software, but it was nice to get confirmation I've been using the right methods. Several of my peers are clearly miles off target, but they were so sure I had to confirm. Apart from the silly mistake with the sign in that one and two others, I've got a clean bill of health across that exercise :) More often that not when I get stuff wrong in maths it's down to not reading the question or copying it across wrong to my books, or dropping a sign like above. I'll give yacas a go in a mo - I generally use apt-get for that sort of thing, any difference using your command? -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html