Answers edited by Layth A.

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• What groups of elements does the d-block contain?
  
• How do you find the limit of #x^2# as x approaches #3^+#?
  
• How do you find the derivative of #4 / (x+3)#?
  
• How do you integrate #int (2x+1) /( (x-2)(x^2+4))# using partial fractions?
  
• How do you find the derivative of #1/x^5#?
  
• How do you convert # (2, -3)# to polar form?