$\int\left(4\cdot x+3\right)\cdot e^{2\cdot x}dx$
$\frac{2x^{-1}+x^{-2}}{x^2+1}$
$\frac{2x^2-11x^2+25}{x-5}$
$-\frac{120}{40}$
$2a^4-2a^3-a+1$
$2x+5>17$
$\lim_{x\to\infty}\left(\frac{x^4-1}{lnx}\right)$
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