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

Read also:

• If a non-LGBT man (of any age) from a Western country attracts far more mosquitoes than potential dates, what does that say about him?
• Why is the Middle East prone to terrorism?
• Is it safe to say that China is at least 30 years ahead of India?
• How do the police verify the authenticity of an online profile? What methods do they use to determine if a profile is real or fake?
• What were the career paths of each member of "The Monkees" after the band disbanded? Did any of them have successful music careers?
• Why do trans people get so deeply offended when a stranger misgenders them, especially when it's a first encounter? I've been socially transitioned for 4 years and it just feels like a waste of energy to be so hurt by it.
• This Electronic Device We All Toss Holds 450 Milligrams of 22-Carat Gold you never knew was there - Indian Defence Review
• Does any unofficial Roman Catholic card exist in the world to play? In Italy, Rome & the Vatican City, can practising Catholics get any discounts as a tourist, & / or privileged admission to certain sights, with different rules for non Catholics?
• I was awaken between 2-3am by a voice that said “Hey”. Literally right next to my ear. Sounded like a males voice, but it wasn’t stern or deep. What could this mean?
• Why do flat earthers think using globetrotter, globetard, and other insults will make the educated arguer fall for the silly flat-earth belief?