$\lim_{x\to-2}\left(\frac{x^2+8x+12}{x^2+6x-12}\right)$
$\int\frac{\sqrt{2x^2-16}}{x^3}dx$
$\frac{d}{dx}\left(b^2x^2+a^2y^2-a^2b^2\right)$
$3\cdot2^2-2$
$2.4+51.21+313.528$
$\sec^2\left(x\right)\cos^2\left(x\right)+\tan^2\left(x\right)$
$\sqrt{\frac{4-x}{x-2}}$
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