dydx(yx−y= 2+x2)\frac{dy}{dx}\left(\frac{y}{x-y}=\:2+x^2\right)dxdy(x−yy=2+x2)
x=−3−2xx=-3-\frac{2}{x}x=−3−x2
(3x+9)2\left(\sqrt{3}x+9\right)^2(3x+9)2
ab−1+ba−1a−1+b−1\frac{ab^{-1}+ba^{-1}}{a^{-1}+b^{-1}}a−1+b−1ab−1+ba−1
5 − 2 − 8b − 7b5\:-\:2\:-\:8b\:-\:7b5−2−8b−7b
−2(c2−c−2)-2\left(c^2-c-2\right)−2(c2−c−2)
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