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

Read also:

• The nine-armed octopus and the oddities of the cephalopod nervous system - Ars Technica
• Im not transphobic/homophobic but, am I in the wrong for being uncomfortable when a trans person comes into the lockeroom? I just dont want them to stare at me while Im changing.
• What is the difference between heaven and heavens?
• Seven replies to the viral Apple reasoning paper and why they fall short - Hacker News
• Markets News, June 6, 2025: S&P 500 Hits 6,000 Points for First Time Since February as Stocks Surge After Jobs Report; Tesla Rebounds From Sell-Off - Investopedia
• How does the "Chain of Thought" prompting technique enhance inductive reasoning in large language models?
• Why Some People Hear Better in Noise Than Others - Neuroscience News
• We've Been Misreading a Major Law of Physics For Nearly 300 Years - ScienceAlert
• Black Cat's Walking Pad Technique Will Leave You Questioning Everything You Know About Exercise - PetHelpful
• Why can't NASA just bite the bullet and launch a plainly simple mission, audited by flat earther peers start to finish that definitively proves to even the smallest minds that the earth is an oblong spheroid, and not flat?
• For an unpublished short story writer, what magazines or online publications offer the best chance of being recognized?