$9x^2+6x+9=0$
$3a-3\left(b-4\right)\left|c+2\right|\left(a-b+3c\right)-\left(a+5c-2b\right)$
$\int_1^2\left(8t^3+3t^2\right)dt$
$\cos\left(a\right)\tan\left(a\right)\csc\left(a\right)\cot\left(a\right)$
$\frac{3-1}{2}$
$\lim_{x\to\infty\:}\left(\frac{\sqrt{x+6x^2}}{3x-1}\right)$
$\frac{-2x^3+7x^2+9x}{x}$
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