$\lim_{x\to0}\left(\left(\frac{4}{x}\right)^{6x}\right)$
$\frac{512a^9-b^9}{2a+b}$
$cos\left(tan^{-1}u-sin^{-1}v\right)$
$a^3+a^3+a^3+a^3$
$\lim_{x\to\infty}\ln\left(x\right)\cdot\sin\left(x\right)$
$\frac{2x}{5}-3\frac{5x}{2}\ge\frac{3x}{4}-\frac{2x}{3}$
$\sin\left(4x\right)\cdot\cos\left(x\right)-\sin\left(3x\right)\cdot\cos\left(2x\right)=\sin\left(x\right)\cdot\cos\left(2x\right)$
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