$\sqrt{2-2cos\left(4x\right)}$
$mx-nx+xy$
$\left(\frac{1}{4}x+8\right)^2$
$\lim_{x\to1}\left(\left(1-x\right)^{cos\left(\frac{3.141592653589}{2}x\right)}\right)$
$\frac{dy}{dx}\left(y=12-5x\right)$
$\lim_{x\to-1}\:x^3+2x$
$\frac{d}{dx}5\:\:^x$
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