$2\left(x-y\right)-\left(y-x\right)^2$
$\int_{\frac{5\pi}{2}}^0cosx\:dx$
$\frac{b+7}{b}=\frac{48}{b-7}$
$-1455-674$
$\frac{4x^2-8x+3}{36x^3+66x^2+40}$
$tg\theta\:.ctg^2\theta\:.sin\theta\:$
$y'=6x-y$
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