$\lim_{x\to2}\left(\frac{x^2-4}{\left|x-2\right|}\right)$
$-7x^2+17x+12$
$\left(2^{-4}\right)^{-3}\left(2^2\right)$
$\frac{a^6b^4}{a^4b^3}$
$\sqrt[4]{x^6}$
$3\frac{dy}{dx}-5x=0$
$tan^2x\left(1+cot^2x\right)=\frac{1}{1-sinx^2}$
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