(xy2+x2)3\left(xy^2+x^2\right)^3(xy2+x2)3
limx→0(x13x14−x13)\lim_{x\to0}\left(\frac{x^{13}}{x^{14}-x^{13}}\right)x→0lim(x14−x13x13)
cos(4x)+4cos(2x)+3=8cos(x)4\cos\left(4x\right)+4\cos\left(2x\right)+3=8\cos\left(x\right)^4cos(4x)+4cos(2x)+3=8cos(x)4
(x+2y)dy+ydx=0\left(x+\frac{2}{y}\right)dy+ydx=0(x+y2)dy+ydx=0
−3y+5z−9z+10y-3y+5z-9z+10y−3y+5z−9z+10y
∫3m2ntdt\int3m^2ntdt∫3m2ntdt
x2 + 7x=−7x^{2\:}+\:7x=-7x2+7x=−7
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