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

Read also:

• How do military families balance personal political views with respect for civilian leadership?
• What is the reason behind some people referring to themselves as "nice guys" instead of simply being nice?
• I see ugly guys dating gorgeous, "hot" women all the time. I, too, am not very attractive but I'm not doing well with the ladies. What's their secret?
• Trump military parade marking Army's 250th birthday takes place in Washington, D.C., today - CBS News
• Why do we often have strong feelings for our twin flames, even if they don't feel the same way? Is there a way to make them realize their true feelings for us?
• Jean Smart Goes South and Solo in Call Me Izzy - Vulture
• How do I stop my 12-year-old daughter from crying herself to sleep? I have punished her and she still does it.
• How come Jesus died on Friday and rose on Sunday? That's not 3 days and three nights.
• What does it mean to dream about demons possessing people, and what can be done about this dream that keeps occurring for years?
• Vantablack Paint Might Have A Legitimate Use Case In Space - Jalopnik
• Why do nice guys rarely or never win?