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

Read also:

• How do I change a truck’s engine oil?
• Why is there so much hate against black people?
• Why do humans sweat while stressed?
• If my lovely sister sleeps with my boyfriend, what should I do about her?
• I have a bad reputation and need help. What should I do?
• Which is a better option, a love marriage or an arranged marriage in India?
• How is TikTok able to censor porn?
• How much of lounge pianists playing is from repertoire, and how much is improvised?
• Why do good-looking men date homely women?
• Does a narcissist ever get their comeuppance/karma for the vile things they've done? Such as cheating, smear campaign, etc.
• What’s the saddest thing you’ve seen at your job?