9x2 − 27x49x^2\:-\:27x^49x2−27x4
(x−5x8+3)\sqrt{\left(\frac{x-5}{x^8+3}\right)}(x8+3x−5)
3x2−6x−1=03x^2-6x-1=03x2−6x−1=0
∫19−x2x4dx\int\frac{1}{\sqrt{9-x^2}x^4}dx∫9−x2x41dx
2∫dx2\int dx2∫dx
limx→−4(x+1−2x−3)\lim_{x\to-4}\left(\frac{\sqrt{x+1}-2}{x-3}\right)x→−4lim(x−3x+1−2)
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