$81x^2-6x+3$
$m^4-81^4$
$\frac{1+\cota}{\csca}=\sina+\cosa$
$-6x\left(x+2\right)-8$
$-37-\left(-5\right)$
$\left(x+5\right)^2<0$
$\frac{48}{16}$
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