$\frac{x^2y^2-1}{xy-1}$
$s^2+8s+12$
$\int\frac{x-5}{x\left(x-1\right)}dx$
$x^2+2x-15\le0$
$\left(\frac{3}{4}y\right)^2+\left(\frac{1}{6}+\left(-\frac{5}{8}\right)\right)\left(\frac{3}{4}y\right)+\left(\frac{1}{6}\right)\left(-\frac{5}{8}\right)$
$-66-x=-61$
$w^2-5w$
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