Answers edited by Proteus

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• How do you add `7sqrt125-2sqrt50`?
  
• What is the most common voice classification for males?
  
• How big can a nebula become?
  
• How would you calculate the size of the universe?
  
• Question #72daa
  
• How do galaxies evolve?
  
• What do the kidneys filter from the blood?
  
• How do you simplify `4+x+(-10)-11x`?
  
• How fast is the universe expanding per second?
  
• How do you solve `7x + 8 >22`?
  
• How many short bones are in the body?
  
• How do you simplify `sqrt(a^3)`?
  
• What is an example of a portmanteau?