$\left(x^{3a}+20\right)\left(x^{3a}-20\right)$
$715^2$
$\frac{9999}{0}$
$\left(2a-3b+2\right)^2$
$cos\:7x\:=\:6$
$\log\left(8x-2\right)=\log\left(x+3\right)+\log\left(9\right)$
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