Question: Find the derivatives below

1. \(\frac{d}{dx}\left( \frac{\ln \left( {{x}^{2}}-4 \right)}{\ln \left( 4-\sinh x \right)} \right)\)
2. \(\frac{{{d}^{2}}}{d{{x}^{2}}}\left( \arcsin \left( \tanh x \right) \right)=-\sec \text{h}x\tanh x\)
3. \(\frac{d}{dx}\frac{{{\arctan }^{x}}x}{\sqrt{x\cos x}}\)

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