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

Read also:

• An 'invisible threat': Swarm of hidden 'city killer' asteroids around Venus could one day collide with Earth, simulations show - Live Science
• Is it mandatory for restaurants to wash glasses after every use?
• Why do some men love sucking cocks?
• Why do you think there is growing support for far-right parties in Europe?
• Recursion lays off 20% of staff in wake of pipeline cutbacks - Fierce Biotech
• PC modding repository Nexus Mods has a new owner - The Verge
• How much gold is there in the world? - Live Science
• Sam Rockwell had his head shaved by strippers before quitting 'G.I. Jane' - Entertainment Weekly
• Why did Trump’s team spin the lie that Melania Trump spoke several languages? Do they not realize she can hardly speak English after living in the US for over 40 years?
• How can I stop overthinking and take action more quickly?
• Et expedita consequatur quam et.