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

Read also:

• Why do most men think that feminism is about dominance and not equality? I'm here for a male perspective. I'm a female.
• There’s Never Been A Better Time To Play The Best Digimon Game - Kotaku
• Do Flat Earthers exist today? If so, where do they live?
• Why am I losing interest to get a job and to all my desires because of this spiritual awakening? How do I get through life because of it?
• What are the ten cars that make me no longer feel inferior?
• Nintendo releases more Switch 1 game updates to improve Switch 2 compatibility - Nintendo Everything
• Cosmic Mystery Solved: Astronomers Have Discovered the Universe’s “Missing” Matter - SciTechDaily
• 10 Must-See Movies at the 2025 Tribeca Festival - IndieWire
• New Clues Emerge on How Life Survived 'Snowball Earth' - ScienceAlert
• What is it like to date a women 20 years younger than yourself?