documentclass[12pt,oneside]{book}

setlength{parindent}{0em}
setlength{parskip}{1em}
usepackage[a4paper,bindingoffset=0.2in,%
left=0.5in,right=0.5in,top=1in,bottom=1in,%
footskip=.25in]{geometry}
usepackage{fourier}
usepackage{amsfonts,amsmath,amssymb,amsthm}
usepackage{mathrsfs,mathtools}
usepackage{tikz,pgfplots}
usetikzlibrary{calc,arrows,arrows.meta,shapes,tikzmark,decorations.markings,decorations.pathreplacing}
usepackage[makeroom]{cancel}

usepackage[utf8]{inputenc}
usepackage[T1]{fontenc}
usepackage[english]{babel}
usepackage{array}
usepackage{caption}
usepackage{float}
usepackage{graphicx}
usepackage{multirow}
usepackage{longtable}
usepackage{enumitem}

usepackage{xcolor,colortbl}
usepackage[colorlinks=true,breaklinks,plainpages=false,linkcolor=blue!50!black,urlcolor=blue!50!black,citecolor=blue!50!black,bookmarks=true,bookmarksopenlevel=2]{hyperref}


usepackage{fancyhdr}
fancyhf{}
renewcommand{headrulewidth}{0pt}
cfoot{thepage}

begin{document}
frontmatter
pagestyle{empty}

begingroup
addtolength{jot}{1em}
[
begin{aligned}
&quadleft(
tikz[baseline,remember picture]{node[fill=green!20,anchor=base] (t1){$ Asqrt{B} $};}pm
tikz[baseline,remember picture]{node[fill=blue!20,anchor=base] (t2){$ Csqrt{D} $};}right)left(
tikz[baseline,remember picture]{node[fill=cyan!20,anchor=base] (n1){$ Esqrt{F} $};}pm
tikz[baseline,remember picture]{node[fill=magenta!20,anchor=base] (n2){$ Gsqrt{H} $};}right)\
end{aligned}
]
endgroup

begin{tikzpicture}[remember picture,overlay] %% use here too
draw[green,thick,->] (t1.north) to [bend left] (n1.north);
draw[green,thick,->] (t1.north) to [bend left] (n2.north);
draw[blue,thick,->] (t2.south) to [bend right] (n2.south);
draw[blue,thick,->] (t2.south) to [bend right] (n1.south);
end{tikzpicture}


end{document}