Create random calculations for quizzes.

quiz.js

function generate() {
    const random = (min, max) => Math.floor(Math.random() * (max - min) + min);

    const numbers = [random(1, 100), random(1, 100)];
    const pointer = ['+', '-', '*', '/'][Math.floor(Math.random() * ['+', '-', '*', '/'].length)];

    let result;
    try {
        result = eval(`${numbers[0]} ${pointer} ${numbers[1]}`);
    } catch {
        throw console.error('Can\'t eval calc');
    }

    return { numbers, pointer, result };
}