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

Read also:

• Dinosaurs Had More Than Just Teeth—They Had Cancer, and It’s Changing Everything - The Daily Galaxy
• What is treasury?
• Tulsa, Oklahoma, plans more than $105m in reparations for America's 'hidden' massacre - BBC
• Will Ukraine eventually return to Russia's sphere of influence?
• Patriots Minicamp Notebook: Moving into the red zone - 98.5 The Sports Hub
• Destiny 2: The Edge Of Fate Draws On Metroidvanias To Bring You Back In - GameSpot
• Is field marketing a permanent job in a particular company?
• What lowers a fever the quickest?
• Have you ever followed through being bi-curious?
• Scientists Are Close to Replicating the First Living Thing - Yahoo