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

Read also:

• Most people obey arbitrary rules even when it's not in their interest to do so, experiments show - Phys.org
• Evidence piles up that Trump's tariffs are crushing job market - Daily Kos
• What are some of your favorite hip hop lyrics?
• Life from oceans to savannas explained with one single rule - Phys.org
• Do you like high heels?
• What do you do when your family doesn’t care about you?
• Why did lobsters evolve bright colors if they are neither poisonous nor venomous?
• This Type of Fiber Could Have Weight Loss Benefits Similar to Ozempic - ScienceAlert
• 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?
• Why do black people prefer thick, curvy women?