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

Read also:

• 8 Things Knee Doctors Say You Should Never, Ever Do - HuffPost
• 346 Million-Year-Old Fossil Rewrites the Story of Life on Land - SciTechDaily
• Report: Knicks have interest in Wolves' Chris Finch as new head coach - Sports Illustrated
• Japan’s oldest “human” fossils aren’t human at all, says new study - Glass Almanac
• Ben & Jerry’s board denounces ‘genocide in Gaza’ in ice-cream maker’s latest salvo against Israel - The Jerusalem Post
• NHL mock draft: Mammoth surprise shakes up the board - theScore.com
• 10 Habits that are Aging Your Gut, According to Experts - EatingWell
• France blown away! Records sent tumbling as Les Bleus concede five goals for the first time in 56 YEARS against incredible Spain - Goal.com
• New discovery at the Grand Canyon has rewritten geology textbooks - Earth.com
• Simple blood test detects cancer up to 3 years before symptoms appear - Earth.com