\input{umtest-preamble}
\usepackage{amsmath,unicode-math}
\setmathfont{Cambria Math}
\begin{document}
   [${x\prime\prime\prime}$]
   [${x\prime\prime\prime\prime\prime\prime}$]
   [${x'}$]
   [${x'''}$]
   [${x''''''}$]
   [${x′}$]
   [${x′′′}$]
   [${x′′'′\prime′}$]
   
   $x⁗‴″′$
   $x′″‴⁗$
   $x″′$
   $x‴$
\end{document}