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

Read also:

• "Unlike Anything We Have Seen Before": Repeating Signal From Deep In Galactic Plane Puzzles Astronomers - IFLScience
• Did you know that we white women prefer Black boyfriends?
• Bed Bugs May Be the First Human Pest, Evolving Alongside Us Since Neanderthal Times - Indian Defence Review
• Meta Agreed to Pay up for Scale AI but Then Wanted More for Its Money - The Information
• If You Can Perform These 5 Moves at 60, Your Body’s Decades Younger - Eat This Not That
• Lower 'bad' cholesterol and higher fat-transport markers linked to less Alzheimer's risk - Medical Xpress
• Las Vegas casino dealers quietly being laid off amid decline in tourism — what’s behind the slump in Sin City - Yahoo
• Walking more may lower your risk for chronic low back pain by 23%, study suggests - KSL.com
• Does the success of autonomous spacecraft and the rise of AI render human involvement in future space exploration unnecessary?
• Knicks’ coaching change could bring them everything they’re chasing - New York Post
• 5 Things to Know Before the Stock Market Opens - Investopedia
• Why would my husband cheat on me with an ugly fat woman?
• Nintendo Switch 2: the Digital Foundry hardware review - Eurogamer