limx→−∞(x2x−2)\lim_{x\to-\infty}\left(\frac{x^2}{x-2}\right)x→−∞lim(x−2x2)
∫9x4y5dx\int9x^4y^5dx∫9x4y5dx
36−8y+y236-8y+y^236−8y+y2
(tan(x)−sin(x)sin(x))(1+cos(x)2)\left(\frac{\tan\left(x\right)-\sin\left(x\right)}{\sin\left(x\right)}\right)\left(1+\cos\left(x\right)^2\right)(sin(x)tan(x)−sin(x))(1+cos(x)2)
9⋅16\sqrt{9}\cdot\sqrt{16}9⋅16
(12m+16n)(12m−16n)\left(\frac{1}{2}m+\frac{1}{6}n\right)\left(\frac{1}{2}m-\frac{1}{6}n\right)(21m+61n)(21m−61n)
12−2\frac{1}{2^{-2}}2−21
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