$y^{-4}y^3$
$\int\left(x-3\right)cox\left(x-3\right)dx$
$\frac{2-x}{4}<\frac{1}{3}$
$\lim_{x\to-1}\left(6x^2+5x+1\right)$
$\frac{1+\cos}{\cos}=\sec+1$
$\left(10x^4+7by^5\right)^2$
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