$144-9a^{2}$
$-1\:.-8+4-2$
$\frac{\left(2x^4-5x^3+x^2\right)}{\left(x-1\right)}$
$y'=\sqrt[2]{y+xy}$
$\frac{dy}{dx}=4sin^2x$
$m^2-2m-8$
$6x+3x+x+x$
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