$\frac{7^6}{7^{-2}}$
$\frac{dy}{dx}=x+\frac{2}{x}$
$\int x^4\cdot e^{-3x^5}dx$
$\frac{12x^2+46x+42}{3x+7}$
$\sqrt{25}-\sqrt{4}$
$\lim_{x\to\infty}\left(\sqrt{x^2+3x+1}-\sqrt{x^2-3x-1}\right)$
$\frac{d}{dx}\:\frac{3\sqrt[5]{\:x^4}}{2}$
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