Answers edited by YouDid

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• How do you find the sum of an infinite series?
  
• What is the limit as x approaches 0 of #sin(1/x)#?
  
• 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#?