$\int x\cdot\cos\left(x\right)-\sin\left(x\right)dx$
$\left(\sqrt{u}\right)\left(\frac{x^2}{2}\right)$
$\frac{4n^2}{2n^2}$
$2\frac{dy}{dt}+y=e^t+e^{-t}$
$16u^2+16u+4$
$\lim_{x\to\infty}\left(\frac{x^2}{5e^{5x}}\right)$
$-1\:-1\:+6\:+1$
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