$cos\pi\:\:x-sin\pi\:\:x$
$\left(3r-s\right)^2$
$y=2\left(x^{\frac{1}{2}}+x^{-\frac{1}{2}}\right)arctan\left(\sqrt{x}\right)$
$\frac{2}{x}=\frac{x}{3}$
$\int\left(e^x\right)\sqrt{64-e^{2x}}dx$
$\frac{8^9}{8^7}$
$\left(z-8\right)\cdot\left(z+2\right)$
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