User blog comment:Testitemqlstudop/FPT 2/@comment-35470197-20191112015320/@comment-35470197-20191112021316

> Because I don't know how to use LaTeX in the wiki.

Then it is good to ask it before giving up.

> "display preview"

The preview system does not work well inthis wiki.

> SPACE

Which kind of spaces? Do you understand the usual behaviour of spaces in LaTeX and find some difference from it?