Most help pages in the Maple help system do not display warning messages. For illustrative purposes, however, warning messages are displayed in a few help pages.

Warnings regarding variables in procedures and modules.

M := module() local a; export b;
    a := proc() c := 2 end proc;
    b := proc() d := 2 end proc;
    e := proc() f := 2 end proc
end module;

Warning, (in M) `e` is implicitly declared local
Warning, (in M:-a) `c` is implicitly declared local
Warning, (in M:-b) `d` is implicitly declared local
Warning, (in M:-e) `f` is implicitly declared local

$M≔\mathbf{module}\left(\right)\mathbf{local}a\,e\;\mathbf{export}b\;\mathbf{end\; module}$

Using the Roots command.

$\mathrm{with}\left(\mathrm{Student}\left[\mathrm{Calculus1}\right]\right)\:$

$\mathrm{Roots}\left(\sin \left(x\right)\,\mathrm{maxsols}=3\right)$

$\left[-\mathrm{\pi }\,0\,\mathrm{\pi }\right]$