5x+y=225x+y=225x+y=22
3.7610\frac{3.76}{10}103.76
7a2+7a27a^2+7a^27a2+7a2
(ax+bc)3\left(\frac{ax+b}{c}\right)^3(cax+b)3
dydx=sec2xtan2y\frac{dy}{dx}=\frac{\sec^2x}{\tan^2y}dxdy=tan2ysec2x
h3=−7\frac{h}{3}=-73h=−7
1.20.04=1.4\frac{1.2}{0.04}=1.40.041.2=1.4
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