$-61-121$
$+3-1+2-2+2-1$
$x^2-2x+1\sqrt{x^5-2x^3}-x-8$
$\log\left(2x-1\right)b=y$
$\frac{d}{dx}\sqrt{2}=3+2\sqrt{y}$
$243-1128+16$
$1+\frac{\tan2}{\cot2}$
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