$\lim_{x\to-1}\:\left(x^2-3x+1\right)$
$\int t^4\left(4+t^5\right)^5dt$
$\left(\frac{2}{7}m+4\right)\left(\frac{2}{7}m-4\right)$
$4w+9w$
$16=-2x+5x^2$
$\int\frac{x\:e^x}{3}dx$
$\int_2^{\infty}\left(\frac{2x}{x^2-3}\right)dx$
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