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

Read also:

• If sea levels were rising, wouldn't the acreage of coastal salt marshes increase? Are they?
• Wall Street warns Trump aides the GOP tax bill could jolt bond markets - The Washington Post
• Never Too Late to Start Eating the MIND Diet That May Prevent Dementia: New Study of 90,000 Over Decades - Good News Network
• My religion teacher said that there are no atheists because in order to reject God, you must first have a concept of God, and if you have a concept of God, you are not an atheist. In what way is this true, if at all? Why?
• Demand in the Housing Market Just Got Even Worse, as Supply Piles Up - Wolf Street
• What are some things you would change about Avatar: The Last Airbender if you were to redo the series?
• Six killed by Israeli gunfire near Gaza aid site, Hamas officials say - BBC
• What, when building a house, are the necessary wires (beside 120v) to future proof my house, Cat6, Coax, low voltage, and alarm wires?
• Boisson Beats Andreeva, Updated French Open Women's Bracket at Roland-Garros - Bleacher Report
• If a person stops thinking one or two words in a second or half second means he had stopped thinking for half second?
• Who is Meghan Markle and why is she so controversial on the Internet?
• What is the XXX XXX Keerna Kappor video?
• Does pressing a girls boobs hurt?
• ‘Yellowstone’ Star Cole Hauser Talks Directing, Bull Riding and Cowboy Future - The Hollywood Reporter