$\lim_{x\to\infty}\frac{ln\left(x-a\right)}{\sqrt{x-a}}$
$3x+7y+4a+6y-2x+5$
$\frac{4^2a^4b^2}{2^3ab^5}$
$\frac{1+\cot^2x}{cotx}=\frac{1}{cosx-cos^3x}$
$\log\left(x\right)+\log\left(4\right)=2$
$\frac{du}{dx}-\frac{u}{x}+x=0$
$0.66+4+44$
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