$\frac{x}{\cos\left(x\right)}=x$
$\log\left(b-3\right)=\log\left(17-4b\right)$
$\left(a+3\right)\left(a-3\right)=a^2$
$523^0$
$3x\:-\:4\:-\:5x\:-\:8y$
$\lim_{n\to4}\left(\cos\left(\frac{n}{\pi}\right)\right)$
$e^{\frac{1}{2}\ln\:\left(x\right)}$
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