$\frac{dy}{dx}=8x\sqrt{4y+14}$
$-4\left(5x-8\right)$
$\lim_{x\to0}\left(\frac{1-\cos\left(2x\right)}{x^2}\right)^{\frac{1}{x^2}}$
$-3x^2+x+2\cdot6x+10$
$10x-8y\sqrt{x^2-1}\frac{dy}{dx}$
$2mn+5mn-3mn$
$k^2\:-\:11k\:+\:28$
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