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

Read also:

• Where did Noah build the Ark? Was it in a desert or near water?
• This Philosophy Quiz Will Prove Whether You're Actually Smart Or Just Pretending - BuzzFeed
• Why do you think Filipinos are conservatives?
• Sloths The Size of Elephants Roamed America, Before Abruptly Vanishing - ScienceAlert
• ‘Smash’ abruptly announces final show after Tony Awards drama in Broadway shocker - New York Post
• Arnold Schwarzenegger Confronted Patrick After He Said He Wished He Didn’t Have His Last Name - BuzzFeed
• 6 "Bad" Fruits You Should Be Eating for Weight Loss, According to Dietitians - EatingWell
• Early visions of Mars: Meet the 19th-century astronomer who used science fiction to imagine the red planet - The Conversation
• My son died seven months ago at the age of 24 how do I know if he’s in heaven and can he see me and hear me and why have I not gotten any signs yet from him or Mom just not seeing the signs how do I know if he’s OK how do I know if he’s happy?
• Mario Kart World is the perfect Switch 2 launch game - The Verge