$\lim_{x\to2}\left(\frac{2-x}{2-\sqrt{4x-x^2}}\right)$
$\sqrt{xe^x}$
$\frac{3}{4}\left(x-2\right)+\frac{1}{2}\left(\frac{x}{2}-\frac{x}{2}+\frac{1}{2}\right)$
$3+2\cdot3\cdot\left(4\cdot2\right)-\left(6-7\right)-2\cdot4\cdot\left(-1\right)$
$2\left(x+3\right)^2$
$\int\frac{240\:}{t^3+2t^2-15t}dt$
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