Answers edited by Daft

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• How do you simplify #(8r^-5s^-4)/(6qr^6s^-7)#?
  
• How do you evaluate #\frac { 4} { 9} + \frac { 2} { 6}#?
  
• Question #d1d14
  
• What is #((3^-1a^4b^-3)^-2)/((6a^2b^-1c^-2)^2)#?
  
• How do you differentiate #f(x)= (2x^2-5)(x+1) # using the product rule?