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

Read also:

• What is the belief about the existence of past lives and memories? Do we have knowledge of our past lives at birth or does it come back to us gradually?
• Do you think a lot of sociopaths' parents kill themselves for having brought such disgusting evil into the world? How much shame and disgust must they carry?
• What is your review of Hartley`s High School, Kolkata?
• If you were president, how would you make America "great again?"
• How did you respond to, "Why do you love me"?
• What does it mean if someone asks if it’s pink?
• How is sex with a woman for gay men?
• How do you perform a lap dance for your boyfriend or husband?
• This Additive Is In Thousands of Foods in the US — and Could Be Disrupting Your Gut Health - Food & Wine
• How do I become a Buddhist, and can someone explain Buddhism to me?
• What is the estimated number of people with an extra X chromosome?
• Why is there so much hate against black people?
• Can a mother forget her child after she puts him or her up for adoption?
• Biotech pauses trial after second patient death linked to gene therapy - The Washington Post