Code

function add(x, y) {

 return x + y;

}

function subtract(x, y) {

 return x - y;

}

function multiply(x, y) {

 return x * y;

}

function divide(x, y) {

 return x / y;

}

function calculate(fn, x, y) {

 return fn(x, y);

}

const result = calculate(multiply, 5, 3) + calculate(subtract, 8, 2);

console.log(result);