Hi Ron, It's difficult for me to assume the result you guessed, without a full complete example of tex file displaying the error (try to shorten your tex file and post it, next time).
I tried next tex content in new file in cloud project without any issue or error from the pdf previewer... As you can read : i write "sage" and the semicolon ":" just after (no extra space). I assume that "sage:" at beginning of line has two purposes : 1) pretty printing of "sage:" 2) evaluating sage command following the "sage:" prompt and displaying the result in next line (that's why with my example, I get the function solution of your first order differentiate equation). I added the computation of sqrt(2)+1 only for an extra explanation about evaluation process. Dominique \documentclass{article} \title{Title of Document} \author{Name of Author} \usepackage{sagetex} \begin{document} \maketitle \begin{sagecommandline} sage: t = var('t') sage: x = function('x')(t) sage: DE = diff(x,t) + x - 1 sage: desolve(DE,[x,t]) \end{sagecommandline} \begin{sagecommandline} sage: (sqrt(2) + 1).n() \end{sagecommandline} \end{document} -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.