chained_math_operations.js

window.Number.prototype.minus = function(n) {
    return (this - n);
};

window.Number.prototype.plus = function(n) {
    return (this + n);
};

window.Number.prototype.times = function(n) {
    return (this * n);
};

window.Number.prototype.dividedBy = function(n) {
    return (this / n);
};

(200).plus(2).minus(1).times(10).dividedBy(2);

this is a basic example, you could do something like this if your application is isolated as you described