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

Read also:

• Walking This Many Steps Per Day Can Cut Your Risk Of Early Death - HuffPost
• Are Turks ashamed of their Islamic heritage?
• Scientists make jaw-dropping find after drilling more than 1,500 feet into Antarctic ice: 'We even discovered a school of lobster-like creatures' - The Cool Down
• Go inside the development of NASA's $10 billion James Webb Space Telescope with new 'Cosmic Dawn' documentary - Space
• Why do we exist, and why are we conscious?
• Nintendo Switch 2 launch: GameStop investigating claims of console damage - NBC News
• Do I need a Walmart account?
• Can AI replace a product manager?
• What is world history that not many people know about?
• Why men with broken heart syndrome are more likely to die, according to experts - East Idaho News
• Why do people believe that global warming is man made?
• SpaceX fires up Super Heavy booster ahead of Starship's 10th test flight (video) - Space