What is the sum of X+XX+XXX+XXXX?

Read also:

• What made you stop being an addict?
• Why do you think it is bad to allow people to self-identify as a different gender?
• — fri(end)s forever!
• Brain cortex structure linked to mental abilities and psychiatric disorders - Medical Xpress
• Why do men say women hit the wall at 24?
• Why do people keep complaining about how some people copy and paste the question before answering it? To me, it's very disturbing and makes me want to block and mute them as annoying whiners.
• Why is the government destroying the homeless instead of helping them?
• Have you ever accidentally found out that you were about to be fired?
• The sun's poles have flipped. A spacecraft is watching what happens next. - Mashable
• How could Trump, with his deplorable garbage supporters, manage to win an election?
• The Gears of War Reloaded beta is here, what you need to know and how to play - Windows Central
• What thing happened to you as a child that you haven’t let go of to this day?
• I can’t get any girl I want, but I can just get some not my type of girls, so I feel I’m so ugly. What should I do?