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

Read also:

• How Can AI Researchers Save Energy? By Going Backward. - Quanta Magazine
• Jack Betts, ‘Spider-Man’ Actor and Spaghetti Western Veteran, Dies at 96 - Variety
• David Jolly, a Trump critic and former GOP congressman, to run for Florida governor as a Democrat - AP News
• Do you think there will ever be peace in the Middle East as long as Israel exists?
• Is mouth taping at night a legitimate anti-snoring method or is it just a popular internet trend without scientific backing?
• Windows 11 Pro Is Going for Pennies on the Dollar, a 92% Price Drop Makes It Almost Free - Gizmodo
• Can someone with ADHD describe the feeling of paralysis and how it affects them?
• 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.
• Elon Musk secretly had baby with Japanese pop star, ex alleges amid heavy ketamine abuse claims - The Indian Express
• Are LGBT people accepted in Japan?
• This Alarming COVID Symptom Is Everywhere With The Latest Variant. We Asked Experts What You Need To Know. - buzzfeed.com
• Cognizant's CEO tells us his counterargument to the idea that AI will decimate entry-level white-collar jobs - Business Insider
• Physicists Unveil New Quantum Super Material That Could Revolutionize Electronics - SciTechDaily
• BTS’ Jungkook and Jimin Discharged from Korean Military After RM and V - Rolling Stone