$\lim_{x\to\infty}\left(\frac{\ln\left(x\right)}{2x^4}\right)$
$\frac{-\infty^2}{2}$
$\left(5x^2+6x+8\right)+\left(4x^2+7xy\right)+\left(3x^2+10x+2\right)$
$\int_{-\infty}^y\left(\frac{1}{25+y^2}\right)dy$
$-4=x^2+4x$
$\int\left(x\cdot\left(4-x^2\right)^3\right)dx$
$\sqrt{\frac{x^2+4x-12}{x-1}}$
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