$\lim_{x\to\infty}\left(xtan\left(\frac{x}{2}\right)\right)$
$4t+20=4$
$-187+-16-60$
$\sqrt{12a^5b^7c}$
$\int\:e^x\:\left(x^2-2x-1\right)dx$
$\frac{x}{2}=-6$
$\int e^{\frac{x}{4}}\cdot\cos\left(\pi x\right)dx$
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