$\lim_{x\to2}\left(\frac{3x^2+2x+1}{x-1}\right)$
$\frac{dy}{dx}=\frac{-y}{2y-x}$
$4z\:+\:x\:-\:5x\:+\:7y\:-\:3x\:+\:5y^2\:-\:3z\:+\:16z\:+\:14x\:-\:5$
$\int\:\frac{\sqrt{x^2-16}}{3x}dx$
$\frac{5x+21}{-4}>1$
$\frac{d^2y}{dx^2}=6$
$75^2\cdot6m^4v^5$
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