$2\left(7ab^5\right)^0$
$2x^2+11x+12=0$
$5\left(x-2\right)+3\left(4x-2\right)-6x$
$-933+-529$
$\frac{\cot^2\left(b\right)+1}{\cot^2\left(b\right)}$
$25x^4-4-\frac{9}{2}x^2+2$
$\lim_{x\to2.9}\left(\frac{x-3}{x^2-9}\right)$
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