$\frac{8}{d\frac{4}{7}}$
$9-9y^8$
$xy\:=\:1\:+\:x^2$
$4-6-7+190$
$6\sin\left(\frac{\pi}{10}\right)\cos\left(\frac{\pi}{10}\right)$
$\left(\frac{-4}{1}z\right)-\left(\frac{3}{5}z\right)$
$y'=\frac{5}{x}$
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