$\frac{y+2}{y+3-1}$
$4y^2-48x-20y=71$
$\cot\left(x\right)=\frac{2\sqrt{14}}{13}$
$\ln\:\left(k\right)=w-\ln\:\left(\frac{5}{3}\right)$
$9w\:-\:w$
$\frac{x^2-1}{x^3+x}$
$764\:-\:65\:+\:36$
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