$\int sin^{-1}2xdx$
$x2+2x-99=0$
$\frac{-3x^2}{\left(x^4-1\right)^2}$
$\csc\left(x\right)+\cot\left(x\right)^2=1$
$\left(k^2-k^4\right)\left(k^2+k^4\right)$
$\lim_{x\to\frac{\pi}{4}}\left(\frac{\sqrt{2-2\cos\left(x\right)}}{\pi-4x}\right)$
$\left(a^3-\frac{4}{3}c^2\right)^2$
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