$z\:2+\:z\:w\:+\:2\:z\:+\:2\:w\:+\:z\:+\:w$
$8b^2-7ab^4$
$\frac{20a^2b^2}{-10a^5b}$
$y^2-7y+12<0$
$3\left(3.1416\right)\left(3.6\right)\left(0.00135\right)$
$\frac{2x^3-5x^2+x-2}{x-1}$
$\int\left(-2\cos t\right)dt$
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