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

Read also:

• Are there any more 'nun' jokes?
• What is the best sunscreen available for summers? My skin is oily.
• What Happens to Your Blood Pressure When You Eat Dark Chocolate Every Day? - Verywell Health
• Meta takes $15 billion stake in Scale AI in bid to catch competitors - The Washington Post
• Why do foolish atheists think their strange delusional theories are facts?
• Gene mutation found in the bacterium behind the Black Death helped plague conquer the world, scientists say - CNN
• Why is my Whirlpool fridge not cooling but the freezer works? What is the solution?
• Adopting the MIND Diet May Lower Dementia Risk at Any Age - Neuroscience News
• Why is Russia always right? All eyes toward Russian glory!
• Practice Report (6/9): Notes from the sideline - New York Giants
• How would you define love?