$\left(c-9\right)\left(c+11\right)$
$\left(2w-3\right)^3$
$\cos\left(0.4\right)$
$4k-8k+2$
$\lim_{x\to0}\left(\frac{12-\cos\left(x\right)}{x^2}\right)$
$3x^2-12x+11$
$8-9-1+12-1$
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