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

Read also:

• Why wasn't Queen as successful in America as in other countries? Then, after Radio Ga Ga, they couldn't even get into the top 40 in America even when these songs were top 10 hits everywhere else in the world.
• Will you share your wife? Can she take both of us at the same time?
• Is the Philippines PH a poor 3rd world or 4th world country forever and forever?
• Why is Hinduism not polytheistic?
• Why am I losing interest to get a job and to all my desires because of this spiritual awakening? How do I get through life because of it?
• Are there any guys, crossdressers, or transgender girls here who wear tampons?
• How do I study with focus and concentration and avoid distractions and procrastination?
• Why are fewer English people going to their local pubs for a drink? Are they aware that many pubs are shutting down due to lack of customers?
• How do you deal with neighbors who are always telling you what to do?
• What is the attitude of the Swedish people towards sending soldiers to Ukraine to fight for the freedom of Europe?