$\left(x-1\right)\left(x\:+\:1\right)-3x\left(x^2\:-\:2x-\:1\right)$
$7\cdot2^3-3\cdot2^2-2+10$
$16x-16-15x-45$
$\frac{d}{dx}\sqrt{2x-3}$
$\sqrt[5]{\frac{a}{b^4c^3}}$
$\lim_{x\to\infty}\:\sqrt{x}-\sqrt{x-4}$
$\lim_{n\to\infty}\frac{x^{n+1}}{\left(n+1\right)^2}$
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