$9x^2-81x+50$
$\left(t^2+1\right)w'+tw=t$
$\frac{d}{dx}\left(\frac{x\sqrt{x^2+7}}{\left(x+8\right)^{\frac{5}{3}}}\right)$
$4x\left(x-y\right)$
$\log\left(x\right)+\log\left(10x\right)=3$
$x\sin\left(x\right)-x^2=0$
$x^2+3x-2>0$
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