$a+\frac{1}{a^2}-2a-3$
$\sin\left(50\right)^2$
$\frac{r^5-2r^6-r+1}{r^2-1}$
$\left(2.6458-1.4142\right)$
$\frac{17m}{2}\left(\frac{2m}{13}+\frac{13n}{11}\right)-\frac{11n}{17}\left(17+\frac{17m}{2}\right)$
$log\left(5x+6\right)\:=\:log\left(4x+8\right)$
$\left(y^5-10x^4\right)^2$
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