$\frac{2^{-3}}{2^{-5}}$
$4y^2+4y-15$
$2,23+3$
$17-7x>1-3x$
$8x^6+\:1$
$\lim\:_{x\to\:0}\left|x\right|cos\left(\frac{1}{x}\right)$
$\int\sqrt{1-4z^2}dx$
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