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

Read also:

• Has the current political environment caused Canadians to cancel trips to the United States?
• Does the interpretation of the Book of בראשית create in all generations the Chosen Cohen People יש מאין?
• Why do Puerto Ricans come to this country flying their flags over in the United States all over their cars? They're so proud of their country. Why are they here?
• Reddit user surprised when 1960s computer panel emerged from collapsed family garage - Ars Technica
• 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?
• Why do people think Justin Bieber is worse than Joseph Stalin?
• How did you cope when someone you love, dealing with hyper-independence and trauma, felt they needed space to heal alone? Were you able to support them without overstepping, and did you eventually reconnect? How did that journey unfold?
• What should a young woman do to control sagging breasts?
• Why do men first look at a woman's chest instead of their face?
• Why does my cat get anxious during loud noises like thunderstorms or firework displays? Is this a common behavior for cats, and is there a way to help them cope with it?