\documentclass{article}
\usepackage{unicode-math}
\usepackage{xepersian}
\ExplSyntaxOn
\cs_set_eq:cN {zf@fontspec} \fontspec_select:nn
\ExplSyntaxOff
\settextfont{XB Zar}
\setdigitfont{XB Zar}
\setmathfont{Cambria Math}
\begin{document}
\[x+y+z+1+2+3+\int_0^1+\mathbf{x}-\mathbb{R}\]
\end{document}