$\int2xe^{\frac{x}{5}}dx$
$\frac{\sin\left(x\right)}{1-\cos\left(x\right)}+\frac{\sin\left(x\right)}{1+\cos\left(x\right)}=2\sin\left(x\right)$
$3^2-4$
$5\cdot4-2-4:\:2$
$\lim_{x\to0}\left(\frac{\tan\left(x\right)}{\cos\left(x\right)}\right)$
$x^2-114x+24=0$
$100\cdot130$
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