(3r−4)−2\left(3r^{-4}\right)^{-2}(3r−4)−2
(a.b)2\left(a.b\right)^2(a.b)2
limx→0.999(1−cos(x)x)\lim_{x\to0.999}\left(\frac{1-\cos\left(x\right)}{x}\right)x→0.999lim(x1−cos(x))
limx→0enx−1−2xx2\lim_{x\to0}\frac{e^{nx}-1-2x}{x^2}x→0limx2enx−1−2x
x2−11+18x2+2x−8\frac{x^2-11+18}{x^2+2x-8}x2+2x−8x2−11+18
9x2+30x+99x^2+30x+99x2+30x+9
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