$-33\cdot3$
$4 x ^ { 2 } - 30 x + 56 = 0$
$\frac{-18x^6}{6x^3}$
$16^2-6x$
$\lim_{x\to1}\frac{\sqrt{x^2+90x-1}-\sqrt{x^3+90x-1}}{x-1}$
$\left(5x^3+10\right)\left(5x^3-10\right)$
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