10x5+28x32x\frac{10x^5+28x^3}{2x}2x10x5+28x3
(25+37m)2\left(\frac{2}{5}+\frac{3}{7}m\right)^2(52+73m)2
1x−3+1x+3=14x2−9\frac{1}{x-3}+\frac{1}{x+3}=\frac{14}{x^2-9}x−31+x+31=x2−914
ydzdyz+z2=0y\frac{dz}{dy}z+z^2=0ydydzz+z2=0
5 (0−3) 5\:\left(0-3\right)\:5(0−3)
limx→∞(x⋅ex−ex2−1)\lim_{x\to\infty}\left(\frac{x\cdot e^x-e}{x^2-1}\right)x→∞lim(x2−1x⋅ex−e)
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