−11+−54-11+-54−11+−54
tan2(30)+tan2(30)\tan^2\left(30\right)+\tan^2\left(30\right)tan2(30)+tan2(30)
500−5y−y2>220500-5y-y^2>220500−5y−y2>220
limx→∞(lnxx2)\lim_{x\to\infty}\left(\frac{lnx}{x^2}\right)x→∞lim(x2lnx)
(1+ax−1)(a+2x)\left(1+ax^{-1}\right)\left(a+2x\right)(1+ax−1)(a+2x)
(1−x2)(−2x)+x(1+c1−2x)=0\left(1-x^2\right)\left(-2x\right)+x\left(1+c\sqrt{1-2x}\right)=0(1−x2)(−2x)+x(1+c1−2x)=0
y3−y2−y+1y^3-y^2-y+1y3−y2−y+1
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