What is the difference between the area of a circle with radius 8 units and the sum of the areas of a rectangle with length 10 units and width 5 units, and a parallelogram with base 12 units and height 6 units? Give the answer in square units.
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What is the graph of y = log(base 2)(x) when x ranges from 1 to 10?
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What is the value of f(x) = log(x) / ln(x), where log represents the logarithm base 10 and ln represents the natural logarithm function?