JSFiddle - React, Tailwind, and code Playground

JavaScript

var expression = "7.2*6+3/2-5*6+(7-2)*5";
var copy = expression;

expression = expression.replace(/[0-9]+/g, "#").replace(/[\(|\|\.)]/g, "");
var numbers = copy.split(/[^0-9\.]+/);
var operators = expression.split("#").filter(function(n){return n});
var result = [];

for(i = 0; i < numbers.length; i++){
     result.push(numbers[i]);
     if (i < operators.length) result.push(operators[i]);
}

console.log(result);