$\frac{1}{3}\left(5\ln\left(x+7\right)+\ln\left(x\right)-\ln\left(x^2-2\right)\right)$
$\int\tan\left(y\right)\sec^2y\:dy$
$y=-\frac{x^2}{45}+x$
$-3-2+-2+1$
$\frac{d^2}{dx^2}\left(\frac{x^2}{4-x^2}\right)$
$\lim_{x\to2}\left(x^3+2x^2-x-4\right)$
$3,2\cdot51$
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