JavaScript get max sum of multiple functions

[NewHere]

I'm trying to get the largest number of this 3 functions then store in an array, the variables of that function and their amount..can be done?

//this must be the result
var result = [50,55,60,165] // function r2

function r1(){
 var x = 5;
 var a = 10;
 var b = 10;
return x+a+b // 25
}
function r2(){
   var x = 50;
   var a = 55;
   var b = 60;
return x+a+b // 165
}
function r3(){
   var x = 25;
   var a = 15;
return x+a // 40
}

 

[OldMan]

Variables defined inside of a function can not be retrieved outside of the function. The function must pass them to the outside. So the return statement of each func has to be rewritten and 'b' must be declared in func r3

<script>
function r1(){
    var x = 5;
    var a = 10;
    var b = 10;
    let arry = [x, a, b, x+a+b];
    return arry;
}
function r2(){
    var x = 50;
    var a = 55;
    var b = 60;
    let arry = [x, a, b, x+a+b];
    return arry;
}
function r3(){
    var x = 25;
    var a = 15;
    var b = 0;
    let arry = [x, a, b, x+a+b];
    return arry;
}

/* These are the arrays of each function */
let arry1 = r1();
let arry2 = r2();
let arry3 = r3();

/* This array is the highest number of the last 3 arrays */
let maxArry = [arry1[3], arry2[3], arry3[3]];

/* This returns the max number in an array of numbers */
let most = maxArry.reduce((a, b) => { return Math.max(a, b) });

/* Proof of the largest number */
alert(most);
</script>