$\frac{dy}{dx}=-3x^2y+x^2$
$\frac{\left(x^2-x+3\right)}{x-2}$
$\frac{cos\left(\frac{\pi}{2}+x\right)}{\cos\left(\pi+x\right)}=\tan\left(x\right)$
$3x^2-18x-28=0$
$\left(32aba^7\right)^0$
$5x^2+15x+1=0$
$25m^2+30m+9$
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