println({
    println("Hello");
    return let x: num = 17 * 2 in
        x + 1;
} + 34);

//----------

let stack = [];

push("Hello");
console.log(pop());
push(17)
push(2)
push(pop() * pop());
push(pop() + 1);
// [35]

push(34)
push(pop() + pop()) // [35] + 34
console.log(pop());