$\int_1^{\infty}\left(\frac{1}{sqrt\left(x^2+1\right)}\right)dx$
$\frac{-15+-45}{5}$
$\left(-45x^4y^6\right)\left(axy^6\right)$
$y^2+4y+3$
$q-70=12$
$\lim_{x\to\infty}\frac{x+3}{x+3}$
$x^2-4x+7$
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