$\lim\:_{x\to\:-1}\left(x^4-3x\right)\left(x^2+5x+3\right)$
$\cos\left(x\right)-\sqrt{2}\sin\left(x\right)=1$
$2mn\left(\frac{3x}{7}-1\right)$
$\int-7\cdot\sec^2\left(3-7x\right)dx$
$\csc^2x-1=\cot^2x$
$6x-4>-3$
$2\cdot2\cdot b\cdot e$
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