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d/(dx)[log{e^x((x-2)/(x+2))^(3//4)}] equ...

`d/(dx)[log{e^x((x-2)/(x+2))^(3//4)}]` equals `(x^2-1)/(x^2-4)` (b) 1 (c) `(x^2+1)/(x^2-4)` (d) `e^x(x^2-1)/(x^2-4)`

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Let `y = [log { e^x ((x-2)/(x+2))^(3/4)}]`
`= log e^x + log ((x-2)/(x+2))^(3/4)`
`= x log e + (3/4) log ((x-2)/(x+2))`
`= x + (3/4) log ((x-2)/(x+2))` ...
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