$\left(\frac{3}{4}xr\right)\left(\frac{7}{2}p\right)\left(\frac{2}{3}t\right)$
$w2+18w+84$
$-5^{-1-3}$
$2x^2+7+5$
$2u^2v-20uv^2+50v^3$
$2z^2-7z-4=0$
$\sqrt{1521}$
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