Question 1045859
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Invert and multiply:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \left(\frac{x\ +\ 4}{16\ -\ x^2}\right)\left(\frac{x\ +\ 4}{x\ +\ 2}\right)]


Factor the quadratic denominator in the left-hand fraction (difference of two squares), then eliminate factors common to numerator and denominator (aka cancel like factors).  Then multiply the two fractions that remain.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  

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