$11ax-12a^2x+33a^3$
$2\cos^2x-5\cos x+2=0$
$\int\frac{3}{5}x\cos\left(x^2+3\right)dx$
$-1250+-3600$
$x^2+26x+144$
$-2\left(x+3\right)+5\left(x+5\right)$
$\lim_{x\to\infty}\left(\frac{x+3}{x-2}\right)$
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