6x2−140=−2x6x^2-140=-2x6x2−140=−2x
−90\sqrt[0]{-9}0−9
limx→0(x4+81x−3)\lim_{x\to0}\left(\frac{x^4+81}{x-3}\right)x→0lim(x−3x4+81)
5x−3=3(2x−1)−x5x-3=3\left(2x-1\right)-x5x−3=3(2x−1)−x
∫sec(y)2tan(y)dy\int\frac{\sec\left(y\right)^2}{\tan\left(y\right)}dy∫tan(y)sec(y)2dy
x−4x8.x−1\frac{x^{-4}}{x^8.x^{-1}}x8.x−1x−4
4x2−6x+134x^2-6x+134x2−6x+13
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