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$\sqrt{v+5}-\sqrt{v^2-7}=0$ $\sqrt[3]{v+5}-\sqrt[2]{v^2-7}=0$ $\dfrac{\tg{(-\frac{\pi}{4})} \cdot{\cotg{(-\frac{\pi}{4})}}} {\sin{(-\frac{3}{2}\pi)} \cdot \cos{(-4\pi)}}$ $x \in A, A \subset B \subseteq C \supset D \supseteq D \ni y$ $\mathcal{ABCD}$
$\dfrac{\tg{(-\frac{\pi}{4})} \cdot{\cotg{(-\frac{\pi}{4})}}} {\sin{(-\frac{3}{2}\pi)} \cdot \cos{(-4\pi)}}$

$\dfrac{\tg{(-\frac{\pi}{4})} \cdot{\cotg{(-\frac{\pi}{4})}}} {\sin{(-\frac{3}{2}\pi)} \cdot \cos{(-4\pi)}}$