$\int\:\frac{\left(\sqrt{x-b^2}\right)}{\sqrt{x}}\:dx$
$45\cdot110$
$\left(x+4\right)\left(x-9\right)\ge9$
$-2,345+3,54$
$3x<4x+4$
$\:x\:-\:14\:<\:-2\:\left(1\:+\:x\right)\:$
$\frac{d}{dx}\frac{x^2+1}{x-1}$
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