$x^2-3x-4<0$
$-5,87+48,73-5,4+98,75$
$\lim_{x\to1}\sqrt[2]{\frac{\left(x^2-2x+15\right)^2}{5-x}}$
$\frac{x^{10}-8}{x^2-2}$
$-\left(19\right)-\left|-12+\left(-11+7\right)+4\right|-5$
$z^2-225$
$\sqrt[5]{125x^9y^{15}}$
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