JSFiddle - React, Tailwind, and code Playground

JavaScript

const latexConversions = [
    ["\\cdot", "*"],
    ["\\right\)", ")"],
    ["\\left\(", "("],
    ["\\pi", "pi"],
    ["\\ln\((.*?)\)", "log($1)"],
    ["stdev\((.*?)\)", "std($1)"],
    ["stdevp\((.*?)\)", "std(\[$1\], \"uncorrected\")"],
    ["mean\((.*?)\)", "mean($1)"],
    ["\\sqrt\((.*?)\)", "sqrt($1)"],
    ["\\log\((.*?)\)", "log10($1)"],
    ["\(e\)", "e"],
    ["\\exp\((.*?)\)", "exp($1)"],
    ["round\((.*?)\)", "round($1)"],
    ["npr\((.*?),(.*?)\)", "($1!/($1-$2)!)"],
    ["ncr\((.*?),(.*?)\)", "($1!/($2!($1-$2)!))"],
    ["\\left\|", "abs("],
    ["\\right\|", ")"],
];

RegExp.escape = function (s) {
    var t = s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
    return t;
};

mathematicalExpression = "\\sqrt( )"

mathematicalExpression = mathematicalExpression.replace(new RegExp(RegExp.escape(latexConversions[8][0], 'g')), latexConversions[8][1]);

mathematicalExpression2 = mathematicalExpression.replace(/\\sqrt\((.*?)\)/g, "sqrt($1)");

alert("what I got: "+mathematicalExpression);
alert("Supposed to be: "+ mathematicalExpression2);