\documentclass{report}
\usepackage{amsmath,mathtools}
\usepackage[left=2cm,right=2cm]{geometry}

\usepackage{xepersian}

\begin{document}
\renewcommand{\baselinestretch}{1.8}
%\tableofcontents
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\begin{align*}
\tilde{C}^1 &= 
\begin{psmallmatrix}
(750,800,850) & (48,50,55) & (195,200,205)& (245,250,255) & (150,200,250) & (390,400,410)\\ 
(58,60,65) & (590,600,620) & (680,700,750) & (1400,1500,2000) & (3400,3500,3600) &(350,400,450)\\ 
(390,400,420) & (195,200,205) & (100,150,200) & (300,350,400) & (390,400,420) & (280,300,320) \\ 
(760,800,840) & (100,150,200) & (190,200,210) & (395,400,405) & (145,150,155) & (1480,1500,1550) \\ 
(150,180,190)  & (300,400,500) & (450,500,550) & (375,400,450) & (1900,2000,2100) & (220,230,240)   
\end{psmallmatrix} \\
 \tilde{C}^1 &= 
\begin{psmallmatrix}
(750,800,850) & (48,50,55) & (195,200,205)& (245,250,255) & (150,200,250) & (390,400,410)\\ 
(58,60,65) & (590,600,620) & 
(680,700,750) & (1400,1500,2000) & (3400,3500,3600) &(350,400,450)\\ (390,400,420) & (195,200,205) &
(100,150,200) & (300,350,400) & (390,400,420) & (280,300,320) \\ (760,800,840) & (100,150,200) & (190,200,210) &
(395,400,405) & (145,150,155) & (1480,1500,1550) \\ (150,180,190) 
& (300,400,500) & (450,500,550) & (375,400,450) & (1900,2000,2100) & (220,230,240)
\end{psmallmatrix}\\
\tilde{C}^1 &= \small
\begin{psmallmatrix}
(750,800,850) & (48,50,55) & (195,200,205)& (245,250,255) & (150,200,250) & (390,400,410)\\ 
(58,60,65) & (590,600,620) & 
(680,700,750) & (1400,1500,2000) & (3400,3500,3600) &(350,400,450)\\ (390,400,420) & (195,200,205) &
(100,150,200) & (300,350,400) & (390,400,420) & (280,300,320) \\ (760,800,840) & (100,150,200) & (190,200,210) &
(395,400,405) & (145,150,155) & (1480,1500,1550) \\ (150,180,190) 
& (300,400,500) & (450,500,550) & (375,400,450) & (1900,2000,2100) & (220,230,240)
\end{psmallmatrix}
\end{align*}
\end{document}‮‮‮‮