$\lim_{x\to1}\left(x^{\frac{8}{1-x}}\right)$
$7z+6=34$
$y''+4y'+5y=0$
$\left(u-\frac{1}{2}\right)^2$
$4 x ^ { 2 } - 30 x + 56 = 0$
$\lim_{x\to16}\left(\frac{x+2}{\sqrt{x}-4}\right)$
$a\left(x+b\right)+x\left(b-a\right)=2b\left(2a-x\right)$
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