$\lim_{t\to0}\left(\frac{sin^2at}{cosat-1}\right)$
$x^2-14x+58=0$
$\left(5x^2+5\right)^3$
$\left(4ab^3+9m^5n\right)^3$
$x^2+9x+5x+45$
$b^2-12+36$
$c^2+7c+10$
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