$-8n+3n=5$
$-83\:-t\:=57$
$126:\left(-9\right)$
$\lim_{x\to-a}\left(x-a\right)ln\left(a-x\right)$
$sinx+cosxcotx=\frac{1}{sinx}$
$n^2-4n+4$
$6\left(\left(4x-1\right)\right)$
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