2x2+1x\frac{2x^2+1}{\sqrt{x}}x2x2+1
limx→1(−x3+x2+1)\lim_{x\to1}\left(-x^3+x^2+1\right)x→1lim(−x3+x2+1)
1x2−84x+11601x^2-84x+11601x2−84x+1160
1−2sin2x+sin4xcos2x\frac{1-2sin^2x+sin^4x}{cos^2x}cos2x1−2sin2x+sin4x
2+cosx−cosx22+cosx-cosx^22+cosx−cosx2
−27−(−8)-27-\left(-8\right)−27−(−8)
(2x2−9)(2x2+9)\left(2x^2-9\right)\left(2x^2+9\right)(2x2−9)(2x2+9)
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