genetic_program_child_d_tikz.tex

\documentclass[tikz, border=2pt]{standalone}
% main document, called main.tex
\usepackage{tikz}
\usetikzlibrary{bayesnet}
\usetikzlibrary{shapes}
\begin{document}

% \title{genetic_program_child_d}
% \author{Dhruv Patel}
% \date{July 2022}

\tikzstyle{node} = [circle, draw=blue!50, minimum size=10mm, fill = blue!50]
\begin{tikzpicture}
        \node[node](plus){$+$};
        \node[node, below left = of plus](sin){$sin$};
        \node[node, below right = of plus](sqrt){$\sqrt{}$};
        \node[node, below left = of sin](x){$x$};
        \node[node, below right = of sqrt](plus2){$+$};
        \node[node, below left = of plus2, draw = red!90, line width = 0.5mm](plus3){$+$};
        \node[node, below right = of plus2](y){$y$};
        \node[node, below left = of plus3](x2){$x$};
        \node[node, below right = of plus3](y2){$y$};
        \path[thick]
            (plus) edge(sin) edge(sqrt) 
            (sin) edge(x)
            (sqrt) edge(plus2)
            (plus2) edge(plus3) edge(y)
            (plus3) edge (x2) edge (y2);	
\end{tikzpicture}
\end{document}