$\left(3^{-2}\right)^{-2}$
$\tan^2x+2\tan\left(x\right)=3$
$y'+5\cdot y=0$
$\sqrt[3]{125x^2y^7}$
$\frac{cot\left(\frac{\pi}{2}-x\right)}{sin\left(x\right)}=csc\left(\frac{\pi}{2}-x\right)$
$4x-3\ge8$
$10ab^2-2ab+7b^2$
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