$-3+.9$
$\lim_{x\to0}\left(\frac{\cos\left(x\right)sin\left(x\right)}{x^2}\right)$
$16x\:+\:10$
$15x^2-8x-16$
$\frac{dq}{dt}=-4q+12$
$6+2\ge8$
$-2x^4+162$
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