\enabletrackers[math.italics,typesetters.italics]

% \setupbodyfont[xits]

\showglyphs

\setupitaliccorrection[always]

\starttext

    \startTEXpage
        \setupmathematics[italics=no]test $a;b;a; b; f;$ test\par
        \setupmathematics[italics=4] test $a;b;a; b; f;$ test\par
        \setupmathematics[italics=4] test $a;b;a; b; f{\tf x}$ test\par
        \setupmathematics[italics=4] test $a;b;a; b; f{\it x}$ test\par
        \setupmathematics[italics=3]test $a;b;a; b; f$; test\par
        \setupmathematics[italics=4] test $a;b;a; b; f$x test\par
        \setupmathematics[italics=4] test $a;b;a; b; f${\tf x} test\par
        \setupmathematics[italics=4] test $a;b;a; b; f${\it x} test\par
    \stopTEXpage

\stoptext
