6x68x4\frac{6x^6}{8x^4}8x46x6
i−ii^{-i}i−i
limx→0(ex−1ex2−1)\lim_{x\to0}\left(\frac{e^x-1}{e^{x^2}-1}\right)x→0lim(ex2−1ex−1)
∫x2(5x+1)15dx\int x^2\left(5x+1\right)^{\frac{1}{5}}dx∫x2(5x+1)51dx
3x2−5x2+52x+123x^2-5x^2+52x+123x2−5x2+52x+12
−x2−4−4x+8\frac{-x^2-4}{-4x+8}−4x+8−x2−4
x2+4x+4=9x^2+4x+4=9x2+4x+4=9
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