$5-\sqrt{x}=\sqrt{1+2x}$
$3x+y=22$
$\left(2x-1\right)\cdot dx+\left(3y+1\right)\cdot dy=0$
$cos^26x-sin^26x$
$\int\frac{\cos x}{\sqrt{2\sin x+1}}dx$
$\lim_{x\to2\pi}\left(\frac{1-cos\left(x-2\pi\right)}{b\left(x-2\pi\right)^2}\right)$
$30-4z,\cos nd0z=-6$
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