$\left(\frac{2x^{-2}}{4y^{-1}}\right)^{-3}$
$\int_{w-1}^{w^3}\left(\sqrt{1-x^2}\right)dx$
$\frac{\sec\left(o\right)}{\sec\left(o\right)-\tan\left(o\right)}$
$\frac{a}{a+1}-1$
$\left(a^4+2b\right)^3$
$\cot^2\left(x\right)\cdot\sec^2\left(x\right)$
$100x^2-80+20$
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