$\sqrt{2x-1}=1$
$\lim_{x\to0}\left(\frac{4x-2\pi}{x^2}\right)$
$\left|-1+\left(-76+65-\left(-3\right)-4\right)\right|$
$\left(x\right)\left(x-4\right)$
$400x^{10}+40x^5+2$
$\left(\frac{1}{x^2}+\frac{1}{x}\right)^2$
$3x^2=5+2x$
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