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

Read also:

• Why aren't there any Indian girls married to Chinese guys but Chinese girls married to Indian guys?
• Why do narcissists devour so much sugar (candy, ice cream, donuts, etc., in huge amounts at a time)?
• Nelly Korda coaxes in final birdie, overcomes front-nine 40 to stay in U.S. Women's Open mix - NBC Sports
• Why cant I sleep? When I'm about to fall asleep, I get excited that im about to sleep, causing me to wake up again. It repeats till my sleepiness is gone. I tried taking melatonin and not using my phone, but I end upawake for hours.
• Why do flat earthers delete their answers after being proven wrong? Are they just being ignorant and arrogant?
• Why do people love to live alone in a house?
• What are some mind-blowing facts that sound unreal but are actually true?
• What I have noticed is nearly every girl I try to connect with whom reject me are in their early 20s why is that the case?
• Space pebbles and rocks play pivotal role in giant planet's formation - Phys.org
• Do you consider yourself pretty?
• What can be done to combat group stalking and harassment by an organized gang or society, particularly when they use universal sound weapons?
• Why did Mark Lane harass Helen Markham during an illegally recorded telephone conversation to misidentify Lee Harvey Oswald who she witnessed as the shooter of Tippit?
• Is the saying "nice guys finish last" true? Can good intentions always lead to positive outcomes?
• What is a good comeback for when someone calls you flat?