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

Read also:

• Everyone says the pet population is out of control. Everyone says you MUST spay or neuter your pets. No one wants to talk about how its almost $1,000 to spay or neuter a pet. Why is it so expensive if its so necessary? Animal shelters do it for free.
• Is homosexuality an excommunicable offense in Christianity?
• Why am I dreaming of people I've never seen before?
• Has anyone ever participated in a gang bang and what was it like?
• Why is Canada letting too many Indians in Canada?
• Why do people love to live alone in a house?
• What do you think about a sister's love?
• What was your best unexpected reunion with your childhood best friend?
• Can you explain the difference between “mi piace” and “mi piacciono” in Italian?
• Why do men like BBW? What is the attraction?
• Has anyone been spanked by their parents after becoming an adult?
• Why can't the ISS take a picture of Earth and prove to the Flat Earth Society that Earth is not really flat?