Inline重构

Parenizor.method('toString', function () {
    var string = '(' + this.getValue() + ')';
    return string;
}

Parenizor.method('toString', function () {
    return '(' + this.getValue() + ')';
}

function Sum(a, b) {
    return a + b;
}

function Multiplication(a, b) {
    c = Sum(a, b);
    d = c * c;
    return d;
}

function Division(a, b) {
    c = Sum(a, b);
    d = Multiplication(a, b);
    result = c / d;
    return result;
}

function Multiplication(a, b) {
    c = a + b;
    d = c * c;
    return d;
}

function Division(a, b) {
    c = a + b;
    d = Multiplication(a, b);
    result = c / d;
    return result;
}