limx→+∞(1−x2x4+1)\lim_{x\to+\infty}\left(\frac{1-x^2}{x^4+1}\right)x→+∞lim(x4+11−x2)
4x2−40x+164x^2-40x+164x2−40x+16
limx→4(−x2+x−4)\lim_{x\to4}\left(-x^2+x-4\right)x→4lim(−x2+x−4)
d2dx2(7x4−2x+8)\frac{d^2}{dx^2}\left(7x^4-2x+8\right)dx2d2(7x4−2x+8)
x−10+9x−3x-10+9x-3x−10+9x−3
480−183480-183480−183
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