const compose = (...fns) => x => fns.reduceRight((acc, fn) => fn(acc), x);

const addTwo = num => num + 2;
const multiplyByThree = num => num * 3;
const subtractTen = num => num - 10;

const calculate = compose(subtractTen, multiplyByThree, addTwo);

console.log(calculate(5));