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

Read also:

• Universal embezzlers naturally emerge in critical fermion systems, study finds - Phys.org
• Scouting Drew Allar: Penn State quarterback similar to Joe Flacco - NFL.com
• Subway owner buys popular chicken chain in $1 billion deal - PennLive.com
• This supermassive black hole is eating way too quickly — and 'burping' at near-light speeds - Space
• How do I maintain and care for granite countertops in a coastal climate like Pompano Beach?
• Why do women stubbornly refuse to let men lead, even though they are attracted to the man, and the man both loves and desires them? Why do they get angry and blame the man when he gets fed up and walks away, when it's entirely their own fault?
• Weight loss connected to nerve cells in the brain, study finds - The Brighter Side of News
• Has anyone who has been a victim of a narcissist made contact with the other victims of the narcissist? Did it help to confirm what you suspected about the narcissists?
• Can the right person make a narc want to change their ways? Is love that powerful? Has anyone seen this or experience it?
• Margaret Cho says Ellen DeGeneres was 'not nice' to her for most of her career: 'It's so creepy and weird' - Entertainment Weekly
• Can you recommend a simple song with an awesome solo? What makes the solo stand out?