Answers edited by YouDid

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• How do you find the sum of an infinite series?
  
• What is the derivative of `-x`?
  
• What is `sqrt{-sqrt3 + sqrt (3 + 8 sqrt (7 + 4 sqrt3`?
  
• How do you simplify by multiplying `(x+10)^2`?
  
• What is the limit as x approaches 0 of `sin(1/x)`?