$\cos\left(\frac{\pi}{7}\right)\cos\left(x\right)-\sin\left(\frac{\pi}{7}\right)\sin\left(x\right)$
$\int\frac{\left(e^{5x}\right)}{\left(2+e^{5x}\right)}dx$
$4m+-5n-m-3n$
$80+57$
$\frac{dy}{dx}-2xy=3x^2e^{x^2}$
$\sqrt[3]{4+4}$
$59,13-7,5$
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