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function myDisplayer(some) {

// eslint-disable-next-line no-undef

document.getElementById('demo').innerHTML = some;

}

function myCalculator(num1, num2, myCallback) {

const sum = num1 + num2;

myCallback(sum);

}

myCalculator(5, 5, myDisplayer);

function myDisplayer(some) {

document.getElementById('demo').innerHTML = some;

}

function getFile(myCallback) {

const req = new XMLHttpRequest();

req.open('GET', 'mycar.html');

req.onload = function () {

if (req.status == 200) {

myCallback(this.responseText);

} else {

myCallback(`Error: ${req.status}`);

}

};

req.send();

}

getFile(myDisplayer);