$\frac{x^2-3x-2}{x+1}$
$5\log\left(x\right)-5\log\left(x^2+1\right)+4\log\left(x-1\right)$
$-\left(\frac{1}{2}\right)^{-2}$
$5\cos^2x-6\sin\left(x\right)=0$
$\left(+15\right)\cdot\left(+66\right)$
$\sqrt{1+x^2x^5}$
$\log\left(4x\right)=-1$
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