$-521\:.\:\left(+15\right)$
$16x^2+48x+36=0$
$\int\frac{1}{\left(1+-10x-x^{2}\right)^{2}}dx$
$\lim_{n\to\infty}\:\left(-2\right)^n+1$
$\frac{dy}{dx}=-2x+3x\sin x^2+3x+1$
$\frac{dy}{dx}=ay\cdot x^{y-1}$
$41-x\ge15$
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