$\left(\frac{u^2}{z^2}\right)\left(\frac{3x^3u^{-1}}{z^{-2}}\right)$
$2u+av-2v-au$
$\int e^{-at}dt$
$\int\frac{1}{\sqrt{16-49x^2}}dx$
$\left(3+\sqrt{-5}\right)\left(7-\sqrt{-10}\right)$
$\frac{-2}{x}+\frac{7}{\left(x-1\right)}$
$39\cdot24$
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