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

Read also:

• How did you respond to, "Why do you love me"?
• Why did my ex of 2 years move on so fast after he left me? Why does he act so cold towards me, and as if I don't exist?
• Pediatric flu deaths surge in Michigan: 'These are children' - The Detroit News
• If English makes 3 additional gender terms to accommodate for XXX, XXY, and XYY people, what would be the most realistic terms for those genders?
• What a list actors/ actresses are notorious for being jerks in real life?
• When reading can – and can't – help with mental health - BBC
• Democrat voters, why are you so naive, easy to manipulate, can't see a liar standing right in front of you and why won't you research your party? You will find they have a plan for all W. Nations and it's evil.
• When do you feel most peaceful ever?
• What is the most popular song that includes the word "you"? Are there any other songs that use "you" multiple times?
• Who is the most annoying character in the Office?
• What's a band that is really popular that you don't like? Why?
• Why do women need to wear bras, in spite of the fact that the breasts are an integral part of the body?
• Shakira Says Being an Immigrant in the U.S. Amid Trump’s Policies “Means Living in Constant Fear” - The Hollywood Reporter
• Why do people hate fat people so much, even people who aren't exactly supermodels themselves? It seems like such a deep, passionate hatred, like they're offended by fat people just existing. Fat people didn't do anything to them, so why hate them?
• Why does a straight man like anal penetration?