$3cos\:u\:sin7u$
$5-4-12-6+10+2-8-6+4-9-7+10-6-9-3+5+7$
$12x^2-84x$
$\frac{dy}{dx}=\left(3x+y\right)^2-12$
$\lim_{x\to\infty}\left(\ln\left(x\right)^2\right)$
$9x^8\sin\:\left(6x\right)+\cos\:\left(6x\right)\cdot\:\:6x^9$
$x^2-20x+400$
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