$x^2+7x-8$
$\lim_{x\to0}\left(\frac{2sin\left(3x^7\right)}{-3x}\right)$
$x^2-x-6\ge0$
$0x\cdot1x$
$-15\left(-4\right)+2\left|-3\left(2\right)+\left(6-2\left(8\right)\right)\right|$
$\left(a^{x+1}-b^{x-1}\right)\cdot\left(b^{x-1}+a^{x+1}\right)$
$\left(\frac{2^{-1}\frac{1}{34}}{2^{-3}3\frac{1}{2}}\right)$
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