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

Read also:

• Trump’s tax bill could raise taxes on foreign companies, hurting investment from abroad - AP News
• How the Brain Actively Removes Unwanted Memories - Neuroscience News
• How do you say "I don't speak French yet, but I hope to speak it well one day. It would be a pleasure to learn French with you. Would you like to teach me French?" in French? Could you add audio?
• The solar system's greatest mystery may finally be solved - Phys.org
• HBO and CNN owner Warner Bros Discovery to split in two - BBC
• Bitcoin nears $105K as Donald Trump demands 'full point' Fed rate cut - Cointelegraph
• Trump airs frustrations with Xi and Jerome Powell over elusive economic goals - NBC News
• Why am I sweating so much at night even though my room is really cold?
• ‘Stronger’ and ‘On Muscle’: What Goes to Work When We Work Out - WSJ
• Popular sugar substitute erythritol may impair brain blood vessel health, study finds - PsyPost
• Judge denies Sean ‘Diddy’ Combs’ second request for mistrial, likens cross-examination to ‘Perry Mason moment’ - CNN
• Wells Fargo Stock Rises as Fed Lifts Asset Cap After 7 Years - Barron's
• Why do flat earthers think using globetrotter, globetard, and other insults will make the educated arguer fall for the silly flat-earth belief?
• Jets owner Woody Johnson buying Crystal Palace with $254 million investment - New York Post