$\lim_{x\to0}\left(\frac{sin^2\left(6x\right)\cos^2\left(4x\right)}{x^2}\right)$
$\frac{dx}{dy}=\frac{xy}{\sqrt{1+x^2}}$
$9b^2+b^2$
$\left(x^2+9\right)\left(x^2-2\right)$
$y=\frac{2}{x}-\frac{1}{x^{2}}$
$\left(\frac{1}{2\cdot\sqrt{x}}+\frac{1}{2}\right)^{10}=105$
$\lim_{x\to\infty}\left(\left(\frac{2x-\cos\:\left(x\right)}{x}\right)\right)$
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