$f\left(x\right)=\left(\frac{2x-x}{x-1}\right)^{\frac{1}{4}}$
$7x^2-47x-14=0$
$\lim_{x\to\infty}\left(-x\right)$
$49^2+56+16$
$3x=3y'-2$
$\frac{8a^2-1}{2a-1}$
$4y-6y-4y$
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