$\log\left(x^2-1\right)-\log\left(x+1\right)=1$
$\lim_{x\to1}\left(5x^2+1\right)$
$\int-e^{-x}sin\left(x\right)dx$
$\left(3\sqrt{5}-2\sqrt{7}\:x\right)\left(3\sqrt{5}+2\sqrt{7}\:x\right)$
$2^2\cdot2^2\cdot3^2\cdot3^2$
$\frac{x-3}{4}-x\le\frac{x-1}{2}-\frac{x-2}{3}$
$\frac{2xy}{\left(x^2y^2\right)^4\cdot x^4y^3}$
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