Monday, April 21, 2014

subtract: x/(x+4) - (x+36)/(x^2-16)

x%2F%28x%2B4%29+-+%28x%2B36%29%2F%28x%5E2-16%29=%28x%28x-4%29-x-36%29%2F%28x%5E2-16%29
then we can write:


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