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

Read also:

• Microsoft will finally stop bugging Windows users about Edge — but only in Europe - The Verge
• OpenAI claims to have hit $10B in annual revenue - TechCrunch
• Trump says Xi agreed to restart flow of crucial minerals, but analysts say China won’t give up its ‘rare earth card’ - CNN
• Rocket Report: SpaceX’s 500th Falcon launch; why did UK’s Reaction Engines fail? - Ars Technica
• Anthropic Researchers Warn That Humans Could End Up Being "Meat Robots" Controlled by AI - futurism.com
• Is depression a cause for always feeling tired?
• How is cultural invasion being carried out by Bollywood?
• Adam Scott, nearly 45 years old, with chance to redefine career on U.S. Open Sunday - NBC Sports
• Is it possible for humans to determine their past life as an animal? Is there a scientific method to prove this?
• Is it possible to legally adopt a family member?
• How long does it typically take for prices to return to normal after tariffs are removed?
• Does the potential of making Star Wars R-rated movies depend on whether Star Wars have stories that is too dark for PG 13 in Disney?
• The USB-C dream is dead and it’s too late to revive it - Android Authority
• Subway owner buys mega-popular chicken chain in $1 billion deal - AL.com
• Solar 'cannonballs' may have stripped Mars of its water, long-awaited study reveals - Live Science