I want to make an web page that solve a various ecuations (Linear or non-linear), so i have to make a function that gets a user input ecuation and transform it into an executable one . For exemple i have: <input type="text" id="ecuation">

and I get the value of this input:

const ecuation = document.querySelector("#ecuation");
let ecutionValue;
ecuation.addEventListener("input" , function(){
    ecuationValue = ecuation.value;
})

Now i want this to be transformed into an ecuation that can be used in a function , or to introduse it into a function.

For example like this:

function ecuation() {
   return //here must be returned the ecuation that user will enter on input
}