$\lim_{x\to1}\frac{\sqrt{x+3}}{x-2}$
$\int\frac{2t^{4}}{3t^{2}-1}dt$
$\left(x-3m\right)^3$
$\int\:-3x\:dx$
$\int-5x^2\:e^{-3x}dx$
$5x+11^2$
$\frac{2x^3-5x^2+x}{x^4-x^2}$
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