$3.4-2.8d+2.8d-13$
$\frac{-3x^2-x+2}{3x-1}$
$\left(3x+2y\right)\left(2x+4y\right)$
$8+1$
$\frac{\left(5^5\:+\:7\right)}{\left(x+2\right)}\:$
$\left(\frac{9}{5}-10w^7\right)^2$
$\lim_{x\to0}\left(\frac{\cos\left(x\right)-1}{e^x-2x-1}\right)$
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