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

Read also:

• What are the different celebrity lists (A-list, B-list, C-list, D-list)? How does one become a part of these lists and move up or down in status?
• Cliffhanger's Black Panther game reportedly would have built upon the famously patented Nemesis System - Rock Paper Shotgun
• ‘Star Wars’ Boss Says It’s ‘Remarkable’ the ‘First Print’ of George Lucas’ 1977 Original Was Found and Screened After Decades; Discovery Called a ‘Miracle’ - Variety
• DNA from 9,000-year-old skeletons disproves migratory waves theory from South Africa - Earth.com
• World No. 1 Jannik Sinner ousts Novak Djokovic from Roland Garros to set up title clash with defending champ Carlos Alcaraz - CNN
• What is the difference between "eher" and " lieber" in German? Are the two synonyms? If yes, then which one is the most used?
• My wife has a bunch of really attractive friends, and she expects me to never say anything to her about how beautiful they are. Does this seem fair? I love my wife, and just commenting shouldn’t hurt anything, right?
• Relativistic jet detected in active galaxy Markarian 110 - Phys.org
• Is an apple a day really good for your health? - BBC
• Which job has the potential to become rich easily?
• Fallout meets BioShock in fascinating new adventure game - GAMINGbible
• Why can’t my wife just accept the fact that I’m going to cheat?